Add sha256 file links

Author: 0xPoe

doc/src/installation/other.md

@@ -33,35 +33,65 @@ If you prefer you can directly download `rustup-init` for the platform of your
 choice:
 
 - [aarch64-linux-android](https://static.rust-lang.org/rustup/dist/aarch64-linux-android/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/aarch64-linux-android/rustup-init.sha256)
 - [aarch64-unknown-linux-gnu](https://static.rust-lang.org/rustup/dist/aarch64-unknown-linux-gnu/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/aarch64-unknown-linux-gnu/rustup-init.sha256)
 - [aarch64-unknown-linux-musl](https://static.rust-lang.org/rustup/dist/aarch64-unknown-linux-musl/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/aarch64-unknown-linux-musl/rustup-init.sha256)
 - [arm-linux-androideabi](https://static.rust-lang.org/rustup/dist/arm-linux-androideabi/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/arm-linux-androideabi/rustup-init.sha256)
 - [arm-unknown-linux-gnueabi](https://static.rust-lang.org/rustup/dist/arm-unknown-linux-gnueabi/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/arm-unknown-linux-gnueabi/rustup-init.sha256)
 - [arm-unknown-linux-gnueabihf](https://static.rust-lang.org/rustup/dist/arm-unknown-linux-gnueabihf/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/arm-unknown-linux-gnueabihf/rustup-init.sha256)
 - [armv7-linux-androideabi](https://static.rust-lang.org/rustup/dist/armv7-linux-androideabi/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/armv7-linux-androideabi/rustup-init.sha256)
 - [armv7-unknown-linux-gnueabihf](https://static.rust-lang.org/rustup/dist/armv7-unknown-linux-gnueabihf/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/armv7-unknown-linux-gnueabihf/rustup-init.sha256)
 - [i686-apple-darwin](https://static.rust-lang.org/rustup/dist/i686-apple-darwin/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/i686-apple-darwin/rustup-init.sha256)
 - [i686-linux-android](https://static.rust-lang.org/rustup/dist/i686-linux-android/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/i686-linux-android/rustup-init.sha256)
 - [i686-pc-windows-gnu](https://static.rust-lang.org/rustup/dist/i686-pc-windows-gnu/rustup-init.exe)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/i686-pc-windows-gnu/rustup-init.exe.sha256)
 - [i686-pc-windows-msvc](https://static.rust-lang.org/rustup/dist/i686-pc-windows-msvc/rustup-init.exe)[^msvc]
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/i686-pc-windows-msvc/rustup-init.exe.sha256)
 - [i686-unknown-linux-gnu](https://static.rust-lang.org/rustup/dist/i686-unknown-linux-gnu/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/i686-unknown-linux-gnu/rustup-init.sha256)
 - [mips-unknown-linux-gnu](https://static.rust-lang.org/rustup/dist/mips-unknown-linux-gnu/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/mips-unknown-linux-gnu/rustup-init.sha256)
 - [mips64-unknown-linux-gnuabi64](https://static.rust-lang.org/rustup/dist/mips64-unknown-linux-gnuabi64/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/mips64-unknown-linux-gnuabi64/rustup-init.sha256)
 - [mips64el-unknown-linux-gnuabi64](https://static.rust-lang.org/rustup/dist/mips64el-unknown-linux-gnuabi64/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/mips64el-unknown-linux-gnuabi64/rustup-init.sha256)
 - [mipsel-unknown-linux-gnu](https://static.rust-lang.org/rustup/dist/mipsel-unknown-linux-gnu/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/mipsel-unknown-linux-gnu/rustup-init.sha256)
 - [powerpc-unknown-linux-gnu](https://static.rust-lang.org/rustup/dist/powerpc-unknown-linux-gnu/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/powerpc-unknown-linux-gnu/rustup-init.sha256)
 - [powerpc64-unknown-linux-gnu](https://static.rust-lang.org/rustup/dist/powerpc64-unknown-linux-gnu/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/powerpc64-unknown-linux-gnu/rustup-init.sha256)
 - [powerpc64le-unknown-linux-gnu](https://static.rust-lang.org/rustup/dist/powerpc64le-unknown-linux-gnu/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/powerpc64le-unknown-linux-gnu/rustup-init.sha256)
 - [s390x-unknown-linux-gnu](https://static.rust-lang.org/rustup/dist/s390x-unknown-linux-gnu/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/s390x-unknown-linux-gnu/rustup-init.sha256)
 - [x86_64-apple-darwin](https://static.rust-lang.org/rustup/dist/x86_64-apple-darwin/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/x86_64-apple-darwin/rustup-init.sha256)
 - [x86_64-linux-android](https://static.rust-lang.org/rustup/dist/x86_64-linux-android/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/x86_64-linux-android/rustup-init.sha256)
 - [x86_64-pc-windows-gnu](https://static.rust-lang.org/rustup/dist/x86_64-pc-windows-gnu/rustup-init.exe)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/x86_64-pc-windows-gnu/rustup-init.exe.sha256)
 - [x86_64-pc-windows-msvc](https://static.rust-lang.org/rustup/dist/x86_64-pc-windows-msvc/rustup-init.exe)[^msvc]
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/x86_64-pc-windows-msvc/rustup-init.exe.sha256)
 - [x86_64-unknown-freebsd](https://static.rust-lang.org/rustup/dist/x86_64-unknown-freebsd/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/x86_64-unknown-freebsd/rustup-init.sha256)
 - [x86_64-unknown-illumos](https://static.rust-lang.org/rustup/dist/x86_64-unknown-illumos/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/x86_64-unknown-illumos/rustup-init.sha256)
 - [x86_64-unknown-linux-gnu](https://static.rust-lang.org/rustup/dist/x86_64-unknown-linux-gnu/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/x86_64-unknown-linux-gnu/rustup-init.sha256)
 - [x86_64-unknown-linux-musl](https://static.rust-lang.org/rustup/dist/x86_64-unknown-linux-musl/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/x86_64-unknown-linux-musl/rustup-init.sha256)
 - [x86_64-unknown-netbsd](https://static.rust-lang.org/rustup/dist/x86_64-unknown-netbsd/rustup-init)
+  - [sha256 file](https://static.rust-lang.org/rustup/dist/x86_64-unknown-netbsd/rustup-init.sha256)
 
 [^msvc]: MSVC builds of `rustup` additionally require an [installation of
     Visual Studio 2019 or the Visual C++ Build Tools 2019][vs]. For Visual