build(deps-dev): bump @types/fs-extra from 8.1.0 to 9.0.1 (#937)

Bumps [@types/fs-extra](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/fs-extra) from 8.1.0 to 9.0.1.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/fs-extra)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

plugins/scaffolder-backend/package.json

@@ -28,7 +28,7 @@
   },
   "devDependencies": {
     "@backstage/cli": "^0.1.1-alpha.6",
-    "@types/fs-extra": "^8.1.0",
+    "@types/fs-extra": "^9.0.1",
     "@types/supertest": "^2.0.8",
     "supertest": "^4.0.2"
   }