chore(deps): update dependency @sanity/pkg-utils to v8.1.13

Author: renovate[bot]

packages/preview-kit/package.json

@@ -91,7 +91,7 @@
     "use-sync-external-store": "^1.5.0"
   },
   "devDependencies": {
-    "@sanity/pkg-utils": "8.1.6",
+    "@sanity/pkg-utils": "8.1.13",
     "@sanity/prettier-config": "^1.0.6",
     "@sanity/semantic-release-preset": "^5.0.0",
     "@types/node": "^24.3.1",