chore(deps): update pkg-dir to package-directory@8.1.0

Author: kohsuke256

packages/eslint-config/package.json

@@ -51,7 +51,7 @@
     "eslint-plugin-react-refresh": "0.4.20",
     "eslint-plugin-tailwindcss": "3.18.0",
     "globals": "16.2.0",
-    "pkg-dir": "8.0.0",
+    "package-directory": "8.1.0",
     "typescript-eslint": "8.34.0",
     "typescript-eslint-parser-for-extra-files": "0.9.0"
   },