Bump eslint from 9.18.0 to 9.21.0

Bumps [eslint](https://github.com/eslint/eslint) from 9.18.0 to 9.21.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](eslint/eslint@v9.18.0...v9.21.0)

---
updated-dependencies:
- dependency-name: eslint
  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/mime-types": "^2.1.4",
     "@types/node": "^20.16.5",
     "@vercel/ncc": "^0.38.3",
-    "eslint": "^9.18.0",
+    "eslint": "^9.21.0",
     "jest": "^29.7.0",
     "js-yaml": "^4.1.0",
     "prettier": "^3.5.3",