chore(deps-dev): bump @eslint/js from 9.18.0 to 9.21.0

Bumps [@eslint/js](https://github.com/eslint/eslint/tree/HEAD/packages/js) 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](https://github.com/eslint/eslint/commits/v9.21.0/packages/js)

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

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -53,7 +53,7 @@
   },
   "devDependencies": {
     "@eslint/compat": "^1.2.0",
-    "@eslint/js": "^9.18.0",
+    "@eslint/js": "^9.21.0",
     "compression-webpack-plugin": "^11.1.0",
     "concurrently": "^9.1.2",
     "cz-conventional-changelog": "3.3.0",

yarn.lock

@@ -1934,10 +1934,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@eslint/js@npm:^9.18.0":
-  version: 9.18.0
-  resolution: "@eslint/js@npm:9.18.0"
-  checksum: 10/364a7d030dad9dbda1458d8dbcea0199fe7d48bcfefe4b49389df6c45cdc5a2449f70e5d8a794e46ed9fb34af3fe5a3f53e30020d306b6ee791e2a1b2b9fa25f
+"@eslint/js@npm:^9.21.0":
+  version: 9.21.0
+  resolution: "@eslint/js@npm:9.21.0"
+  checksum: 10/6c03f96a3e7c5825e780c707edbaa211ca976007a7194794a1e0cfaba76eae8759c9076ac15cab929b57323a117a385e99711395cbb3e58b8af7e5d95097160c
   languageName: node
   linkType: hard
 
@@ -2282,7 +2282,7 @@ __metadata:
   resolution: "@hawtio/online-root@workspace:."
   dependencies:
     "@eslint/compat": "npm:^1.2.0"
-    "@eslint/js": "npm:^9.18.0"
+    "@eslint/js": "npm:^9.21.0"
     compression-webpack-plugin: "npm:^11.1.0"
     concurrently: "npm:^9.1.2"
     cz-conventional-changelog: "npm:3.3.0"