New git version to depot_tools stable.

This version has a native package available for mac-arm64.

Bug: 1184766
Change-Id: Ifb9b067ec94522ec05b544db0828cb18240965cd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3127607
Reviewed-by: Jonathan Nieder <jrn@chromium.org>
Reviewed-by: Josip Sokcevic <sokcevic@google.com>
Reviewed-by: Dirk Pranke <dpranke@google.com>
Commit-Queue: Brian Ryner <bryner@google.com>

bootstrap/manifest.txt

@@ -15,7 +15,7 @@
 # the string "cpython3/" and ends with the CIPD tag "version:VERSION".
 # It uses this to extract VERSION.
 
-$VerifiedPlatform windows-amd64 linux-amd64 mac-amd64
+$VerifiedPlatform windows-amd64 linux-amd64 mac-amd64 mac-arm64
 
 @Subdir python
 infra/3pp/tools/cpython/${platform} version:2@2.7.18.chromium.39
@@ -23,6 +23,5 @@ infra/3pp/tools/cpython/${platform} version:2@2.7.18.chromium.39
 @Subdir python3
 infra/3pp/tools/cpython3/${platform} version:2@3.8.10.chromium.20
 
-# TODO(https://crbug.com/1184766): Remove `=amd64` once mac/arm64 git exists
 @Subdir git
-infra/3pp/tools/git/${os}-${arch=amd64} version:2@2.30.2.chromium.6
+infra/3pp/tools/git/${platform} version:2@2.33.0.chromium.6