Bump @backstage/plugin-scaffolder-backend in /backstage

Bumps [@backstage/plugin-scaffolder-backend](https://github.com/backstage/backstage/tree/HEAD/plugins/scaffolder-backend) from 1.23.0 to 2.1.1.
- [Release notes](https://github.com/backstage/backstage/releases)
- [Changelog](https://github.com/backstage/backstage/blob/master/plugins/scaffolder-backend/CHANGELOG.md)
- [Commits](https://github.com/backstage/backstage/commits/HEAD/plugins/scaffolder-backend)

---
updated-dependencies:
- dependency-name: "@backstage/plugin-scaffolder-backend"
  dependency-version: 2.1.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

backstage/packages/backend/package.json

@@ -32,7 +32,7 @@
     "@backstage/plugin-permission-common": "^0.8.0",
     "@backstage/plugin-permission-node": "^0.8.0",
     "@backstage/plugin-proxy-backend": "^0.5.2",
-    "@backstage/plugin-scaffolder-backend": "^1.19.1",
+    "@backstage/plugin-scaffolder-backend": "^2.1.1",
     "@backstage/plugin-search-backend": "^1.4.7",
     "@backstage/plugin-search-backend-module-pg": "^0.5.16",
     "@backstage/plugin-search-backend-node": "^1.2.11",