Auto merge of #12096 - ehuss:update-git2, r=weihanglo

Update git2

This is a very minor update to libgit2 which fixes an issue when the ProgramData folder is missing on Windows.

git2 changelog: https://github.com/rust-lang/git2-rs/blob/master/CHANGELOG.md#0171---2023-04-13
libgit2-sys changelog: https://github.com/rust-lang/git2-rs/blob/master/libgit2-sys/CHANGELOG.md#0151164---2023-04-13
libgit2 changelog: https://github.com/libgit2/libgit2/releases/tag/v1.6.4

Author: bors

Cargo.lock

@@ -31,7 +31,7 @@ env_logger = "0.10.0"
 filetime = "0.2.9"
 flate2 = { version = "1.0.3", default-features = false, features = ["zlib"] }
 fwdansi = "1.1.0"
-git2 = "0.17.0"
+git2 = "0.17.1"
 git2-curl = "0.18.0"
 gix = { version = "0.44.1", default-features = false, features = ["blocking-http-transport-curl", "progress-tree"] }
 gix-features-for-configuration-only = { version = "0.29.0", package = "gix-features", features = [ "parallel" ] }
@@ -51,7 +51,7 @@ jobserver = "0.1.26"
 lazy_static = "1.3.0"
 lazycell = "1.2.0"
 libc = "0.2.88"
-libgit2-sys = "0.15.0"
+libgit2-sys = "0.15.1"
 log = "0.4.17"
 memchr = "2.1.3"
 miow = "0.5.0"