update workflow: always commit so scheduled runs have a consistent label

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.forgejo/workflows/update.yml

@@ -37,12 +37,8 @@ jobs:
       - name: Commit and push
         run: |
           set -euxo pipefail
-          if git diff --quiet flake.lock; then
-            echo "No changes to flake.lock — skipping commit."
-            exit 0
-          fi
           git config user.name 'forgejo-actions[bot]'
           git config user.email 'actions@forg.gregersen.it'
           git add flake.lock
-          git commit -m 'flake: update inputs'
+          git commit --allow-empty -m 'Update flake inputs'
           git push