ci: skip staging build on release commits

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

Author: mxmlnwbr

.github/workflows/docker-image-stg.yml

@@ -10,6 +10,7 @@ env:
 
 jobs:
   build-stg:
+    if: ${{ !startsWith(github.event.head_commit.message, 'chore(release)') }}
     runs-on: ubuntu-latest
     permissions:
       contents: read