chore: try to fix the mistaken-pull-closer config

Google APIs · copybara-github · commit 9e6c8c62613f · 2021-11-05T10:10:27.000-07:00
PiperOrigin-RevId: 407849101
diff --git a/.github/mistaken-pull-closer.yml b/.github/mistaken-pull-closer.yml
@@ -4,7 +4,7 @@
 # Default behavior: Close all PRs.
 filters:
   # Don't close PRs in the pubsub_dev branch.
-  - @.pull_request.base.ref != "pubsub_dev"
+  - '@.pull_request.base.ref != "pubsub_dev"'
 
 # The message to post to the closed PR.
 commentBody: |
