Updating command-rebase.yml workflow from template

Signed-off-by: Nextcloud bot <bot@nextcloud.com>

Author: nextcloud-bot

.github/workflows/command-rebase.yml

@@ -26,7 +26,7 @@ jobs:
           reaction-type: "+1"
 
       - name: Checkout the latest code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
           token: ${{ secrets.COMMAND_BOT_PAT }}