chore(deps): update dependency eslint to v9

Author: renovate[bot]

package.json

@@ -49,7 +49,7 @@
     "@typescript-eslint/eslint-plugin": "^7.18.0",
     "@typescript-eslint/parser": "^7.18.0",
     "diff": "7.0.0",
-    "eslint": "^8.57.1",
+    "eslint": "^9.20.1",
     "eslint-plugin-etc": "^2.0.3",
     "eslint-plugin-rxjs": "^5.0.3",
     "eslint-plugin-unicorn": "^55.0.0",