Bump eslint from 9.20.1 to 9.21.0

Bumps [eslint](https://github.com/eslint/eslint) from 9.20.1 to 9.21.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v9.20.1...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

@@ -47,7 +47,7 @@
     "@antfu/eslint-config": "4.3.0",
     "@eslint/js": "^9.20.0",
     "@types/node": "^22.13.4",
-    "eslint": "^9.20.1",
+    "eslint": "^9.21.0",
     "globals": "^15.15.0",
     "husky": "^9.1.7",
     "lint-staged": "^15.4.3",