Upgrade git to v2.30.2

R=ehmaldonado@chromium.org

Bug: 1187284
Change-Id: Ie1cf605ec87fc278b9aa9e67081917fcb25556c1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2774094
Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>
Commit-Queue: Josip Sokcevic <sokcevic@google.com>

bootstrap/manifest.txt

@@ -24,4 +24,4 @@ infra/3pp/tools/cpython/${platform} version:2.7.17.chromium.22
 infra/3pp/tools/cpython3/${os}-${arch} version:3.8.0.chromium.8
 
 @Subdir git
-infra/3pp/tools/git/${os}-${arch} version:2.28.0.chromium.6
+infra/3pp/tools/git/${os}-${arch} version:2@2.30.2.chromium.6