chore(deps): update dependency eslint to v9

Author: renovate[bot]

apps/ionic-demo/package.json

@@ -104,7 +104,7 @@
     "@types/node": "^20.12.2",
     "@typescript-eslint/eslint-plugin": "^7.4.0",
     "@typescript-eslint/parser": "^7.4.0",
-    "eslint": "^8.57.0",
+    "eslint": "^9.0.0",
     "eslint-plugin-import": "^2.29.1",
     "eslint-plugin-jsdoc": "^48.2.2",
     "eslint-plugin-prefer-arrow": "^1.2.3",