Fix git comment.

Author: jonsimantov

.github/workflows/update-dependencies.yml

@@ -107,6 +107,7 @@ jobs:
           Automatically updated by [workflow]($GITHUB_SERVER_URL/$GITHUB_REPOSITORY/actions/runs/$GITHUB_RUN_ID)."
             git config user.email "[email protected]"
             git config user.name "firebase-workflow-trigger-bot"
+            git config core.commentChar "%"  # so we can use # in git commit messages
             git commit -a -m "${commit_title}
 
           ${commit_body}"