Bump @eslint/js from 9.12.0 to 9.13.0 in /webapp

Bumps [@eslint/js](https://github.com/eslint/eslint/tree/HEAD/packages/js) from 9.12.0 to 9.13.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/commits/v9.13.0/packages/js)

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

Signed-off-by: dependabot[bot] <support@github.com>

webapp/package.json

@@ -31,7 +31,7 @@
     "@browser-logos/uc": "1.1.0",
     "@browser-logos/webkit-nightly": "2.0.2",
     "@eslint/eslintrc": "^3.1.0",
-    "@eslint/js": "^9.12.0",
+    "@eslint/js": "^9.13.0",
     "@polymer/test-fixture": "4.0.2",
     "cpy-cli": "5.0.0",
     "eslint": "9.12.0",