Update setup-homebrew

Closes https://github.com/dart-lang/homebrew-dart/pull/137

GitOrigin-RevId: 78c6fb978253e70f23eba471eb24d3d4e5bb5d21
Change-Id: I93409f13dbcd2ed227c6b62a01d543efbd386092
Reviewed-on: https://dart-review.googlesource.com/c/homebrew-dart/+/287101
Reviewed-by: William Hesse <whesse@google.com>
Commit-Queue: Alexander Thomas <athom@google.com>
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index f93db53..0988e37 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -19,7 +19,7 @@
     steps:
       - name: Set up Homebrew
         id: set-up-homebrew
-        uses: Homebrew/actions/setup-homebrew@29b2973f18e5aca5443f4b3d87f68eda7a27b22b
+        uses: Homebrew/actions/setup-homebrew@251cc053a43110ce4dea3cdb6f038147c82d0257
 
       - name: Cache Homebrew Bundler RubyGems
         id: cache