change documentation url

Author: amakropoulos

package.json

@@ -5,7 +5,7 @@
   "description": "LLM for Unity allows to run and distribute Large Language Models (LLMs) in the Unity engine.",
   "unity": "2022.3",
   "unityRelease": "16f1",
-  "documentationUrl": "https://github.com/undreamai/LLMUnity",
+  "documentationUrl": "https://undream.ai/LLMUnity",
   "testables": [
     "undream.llmunity.Runtime.Tests"
   ],