Manual roll to fix git caching issues.

The problem with git caches was fixed upstream in depot_tools. The
details can be found here: https://crbug.com/1334889

Change-Id: I21082c9c696caa4b3727d1eb08ad6772bb594541
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/31082
Reviewed-by: Dan Field <dnfield@google.com>
Commit-Queue: Godofredo Contreras <godofredoc@google.com>
Reviewed-by: Keyong Han <keyonghan@google.com>
diff --git a/infra/config/recipes.cfg b/infra/config/recipes.cfg
index ccb191e..5fd4cad 100644
--- a/infra/config/recipes.cfg
+++ b/infra/config/recipes.cfg
@@ -25,7 +25,7 @@
   "deps": {
     "depot_tools": {
       "branch": "refs/heads/main",
-      "revision": "a4b3602457c422f8ed054ff3673baaecedc2972a",
+      "revision": "a9467d8216950a1238f9eba9e67c60144309caff",
       "url": "https://chromium.googlesource.com/chromium/tools/depot_tools.git"
     },
     "fuchsia": {