Merge branch 'main' into glitch-soc/merge-upstream

Conflicts:
- `.github/dependabot.yml`:
  Upstream made changes while we have dropped this file.
  Keep the file deleted.
- `.prettierignore`:
  Upstream made changes at the end of the file, where we
  had our extra lines.
  Just moved our extra lines back at the end.
- `app/serializers/initial_state_serializer.rb`:
  Upstream code style changes.
  Applied them.
- `app/services/backup_service.rb`:
  Upstream code style changes.
  Applied them.

.github/workflows/build-image.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
 
     concurrency:
-      group: ${{ github.ref }}
+      group: ${{ github.workflow }}-${{ github.ref }}
       cancel-in-progress: true
 
     steps: