chore(deps): update eslint monorepo to ^9.21.0

Author: renovate[bot]

package.json

@@ -18,11 +18,11 @@
     "sanitize-html": "^2.14.0"
   },
   "devDependencies": {
-    "@eslint/js": "^9.20.0",
+    "@eslint/js": "^9.21.0",
     "@types/react": "^19.0.10",
     "@types/react-dom": "^19.0.4",
     "@vitejs/plugin-react": "^4.3.4",
-    "eslint": "^9.20.1",
+    "eslint": "^9.21.0",
     "eslint-plugin-react": "^7.37.4",
     "eslint-plugin-react-hooks": "^5.1.0",
     "eslint-plugin-react-refresh": "^0.4.19",