GettingStarted.md: Fix indentation in bullet so that it renders correctly

Author: AnthonyLatsis

docs/HowToGuides/GettingStarted.md

@@ -157,23 +157,24 @@ Double-check that running `pwd` prints a path ending with `swift`.
    * [Amazon Linux 2](https://github.com/apple/swift-docker/blob/main/swift-ci/master/amazon-linux/2/Dockerfile)
 
 2. To install [Sccache][] (optional):
-  * If you're not building within a Docker container:
-   ```
-   sudo snap install sccache --candidate --classic
-   ```
-   * If you're building within a Docker container, you'll have to install `sccache` manually, since [`snap`
-   is not available in environments without `systemd`](https://unix.stackexchange.com/questions/541230/do-snaps-require-systemd):
+   * If you're not building within a Docker container:
+     ```sh
+     sudo snap install sccache --candidate --classic
+     ```
+   * If you're building within a Docker container, you'll have to install
+     `sccache` manually, since [`snap` is not available in environments
+     without `systemd`](https://unix.stackexchange.com/questions/541230/do-snaps-require-systemd):
 
-   ```
-   SCCACHE_VERSION=v0.3.0
-   curl -L "https://github.com/mozilla/sccache/releases/download/${SCCACHE_VERSION}/sccache-${SCCACHE_VERSION}-$(uname -m)-unknown-linux-musl.tar.gz" -o sccache.tar.gz
-   tar xzpvf sccache.tar.gz
-   sudo cp "sccache-${SCCACHE_VERSION}-$(uname -m)-unknown-linux-musl/sccache" /usr/local/bin
-   sudo chmod +x /usr/local/bin/sccache
-   ```
+     ```sh
+     SCCACHE_VERSION=v0.3.0
+     curl -L "https://github.com/mozilla/sccache/releases/download/${SCCACHE_VERSION}/sccache-${SCCACHE_VERSION}-$(uname -m)-unknown-linux-musl.tar.gz" -o sccache.tar.gz
+     tar xzpvf sccache.tar.gz
+     sudo cp "sccache-${SCCACHE_VERSION}-$(uname -m)-unknown-linux-musl/sccache" /usr/local/bin
+     sudo chmod +x /usr/local/bin/sccache
+     ```
 
-   **Note:** LLDB currently requires at least `swig-1.3.40` but will
-   successfully build with version 2 shipped with Ubuntu.
+**Note:** LLDB currently requires at least `swig-1.3.40` but will
+gsuccessfully build with version 2 shipped with Ubuntu.
 
 [Sccache]: https://github.com/mozilla/sccache