Use single quotes in action job (#10579)

Author: carmocca

.github/workflows/probot-auto-cc.yml

@@ -9,7 +9,7 @@ on:
 jobs:
   auto-cc:
     runs-on: ubuntu-latest
-    if: github.event_name == "issue" || github.event.pull_request.draft == false
+    if: github.event_name == 'issue' || github.event.pull_request.draft == false
     steps:
       - uses: carmocca/probot@v1
         env: