Bump @typescript-eslint/eslint-plugin from 6.18.0 to 6.21.0

Bumps [@typescript-eslint/eslint-plugin](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin) from 6.18.0 to 6.21.0.
- [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/v6.21.0/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] <support@github.com>

package.json

@@ -37,7 +37,7 @@
         "@types/react": "^18.2.55",
         "@types/react-dom": "^18.2.18",
         "@types/react-router-dom": "^5.3.3",
-        "@typescript-eslint/eslint-plugin": "^6.18.0",
+        "@typescript-eslint/eslint-plugin": "^6.21.0",
         "@typescript-eslint/parser": "^6.18.0",
         "buffer": "^6.0.3",
         "eslint": "^8.56.0",