fix: @sanity/ui doesn't need to be a peer dependency

Author: stipsan

packages/next-sanity/package.json

@@ -152,7 +152,6 @@
   },
   "peerDependencies": {
     "@sanity/client": "catalog:",
-    "@sanity/ui": "^2.16.7",
     "next": "^15.1",
     "react": "^19",
     "react-dom": "^19",