Update clean-untagged-builds.yml

Author: iFargle

.github/workflows/clean-untagged-builds.yml

@@ -1,6 +1,6 @@
 name: Remove old package versions
 on:
-  [push]
+  workflow_dispatch:
 jobs:
   remove-package-versions:
     runs-on: ubuntu-latest
@@ -9,4 +9,4 @@ jobs:
         uses: dylanratcliffe/delete-untagged-containers@main
         with:
           package_name: headscale-webui
-          token: ${{ secrets.ACTIONS_WORKFLOWS }}
+          token: ${{ secrets.ACTIONS_WORKFLOWS }}