ci: use tag as sw version

.github/workflows/ci.yml

@@ -124,7 +124,7 @@ jobs:
           sed -i 's/foodwars/${{ secrets.EMAILPASS }}/' config/app_local.php
           sed -i 's/essen@rindula\.de/[email protected]/' config/app_local.php
           sed -i 's/{rindula\.de\/imap\/novalidate-cert}INBOX/{sslin.df.eu\/imap\/ssl}INBOX/' config/app_local.php
-          sed -i "s/hirschcache/$GITHUB_SHA/" webroot/sw.js
+          sed -i "s/hirschcache/${GITHUB_REF#refs/tags/}/" webroot/sw.js
           sed -i "s/user_auth_string/$(echo -n ${{ secrets.HT_USER }}:${{ secrets.HT_PASS }} | base64)/" webroot/sw.js
       - name: Passwortschutz erstellen
         if: "${{ steps.commit_step.outputs.pushed == 'false' }}"