fix: plugins/scaffolder-backend-module-rails/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-MULTER-10185673
- https://snyk.io/vuln/SNYK-JS-MULTER-10185675

Author: snyk-io[bot]

plugins/scaffolder-backend-module-rails/package.json

@@ -27,7 +27,7 @@
     "@backstage/config": "workspace:^",
     "@backstage/errors": "workspace:^",
     "@backstage/integration": "workspace:^",
-    "@backstage/plugin-scaffolder-backend": "workspace:^",
+    "@backstage/plugin-scaffolder-backend": "0.1.1",
     "@backstage/plugin-scaffolder-node": "workspace:^",
     "@backstage/types": "workspace:^",
     "command-exists": "^1.2.9",