Yjs demo: Add y-protocols to deps

Author: cahofmeyr

demos/yjs-nextjs-supabase-text-collab/package.json

@@ -46,7 +46,8 @@
     "shiki": "^0.10.0",
     "simplify-js": "^1.2.4",
     "uuid": "9.0.1",
-    "y-prosemirror": "1.0.20",
+    "y-prosemirror": "1.0.20", 
+    "y-protocols": "1.0.6", 
     "yjs": "^13.6.11"
   },
   "devDependencies": {