Update cherry-pick.yml

Author: stevsmit

.github/workflows/cherry-pick.yml

@@ -11,7 +11,7 @@ jobs:
       startsWith(github.event.comment.body, '/cherry-pick')
     steps:
       - name: Check out repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v2
 
       - name: Set up Git
         run: |