Add clean-git-branches option to updatecli command

Author: olblak

.github/workflows/updatecli.yaml

@@ -35,7 +35,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: "Run updatecli"
         if: github.ref == 'refs/heads/master'
-        run: "updatecli compose apply"
+        run: "updatecli compose apply --clean-git-branches=true"
         env:
           UPDATECLI_GITHUB_APP_CLIENT_ID: ${{ secrets.UPDATECLIBOT_APP_ID }}
           UPDATECLI_GITHUB_APP_PRIVATE_KEY: ${{ secrets.UPDATECLIBOT_APP_PRIVKEY }}