chore: bump @typescript-eslint/eslint-plugin

Bumps [@typescript-eslint/eslint-plugin](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin) from 8.20.0 to 8.21.0.
- [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases)
- [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/eslint-plugin/CHANGELOG.md)
- [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v8.21.0/packages/eslint-plugin)

---
updated-dependencies:
- dependency-name: "@typescript-eslint/eslint-plugin"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

examples/openfeature_react/react-app/package-lock.json

@@ -20,7 +20,7 @@
   "devDependencies": {
     "@types/react": "^19.0.8",
     "@types/react-dom": "^19.0.3",
-    "@typescript-eslint/eslint-plugin": "^8.20.0",
+    "@typescript-eslint/eslint-plugin": "^8.21.0",
     "@typescript-eslint/parser": "^8.21.0",
     "@vitejs/plugin-react": "^4.3.4",
     "autoprefixer": "^10.4.20",