build(deps-dev): bump eslint from 9.20.1 to 9.21.0 (#530)

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](eslint/eslint@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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -49,7 +49,7 @@
     "@types/node": "22.13.5",
     "@typescript-eslint/eslint-plugin": "8.25.0",
     "@typescript-eslint/parser": "8.25.0",
-    "eslint": "9.20.1",
+    "eslint": "9.21.0",
     "eslint-plugin-prettier": "5.2.3",
     "eslint-plugin-simple-import-sort": "12.1.1",
     "eslint-plugin-tsdoc": "0.4.0",