Move workflow to .gitea/workflows/ for Gitea Actions compat

.gitea/workflows/sync-upstream.yml

@@ -10,11 +10,10 @@ jobs:
   sync:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout from Forgejo
+      - name: Checkout from Gitea
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-          # Forgejo Actions auto-provides GITEA_TOKEN for the current repo
           token: ${{ secrets.GITEA_TOKEN }}
 
       - name: Add upstream remote
@@ -55,8 +54,8 @@ jobs:
       - name: Commit and push
         if: steps.sync.outputs.changed == 'true'
         run: |
-          git config user.name "forgejo-actions[bot]"
-          git config user.email "forgejo-actions@git.vpsj.de"
+          git config user.name "gitea-actions[bot]"
+          git config user.email "gitea-actions@git.vpsj.de"
 
           UPSTREAM_SHA=$(git rev-parse --short upstream/main)
           git commit -m "Sync skills from obra/superpowers upstream (${UPSTREAM_SHA})"