docs: update packages.yml (#3351)

docs/_scripts/third_party_page/create_third_party_page.py

@@ -19,6 +19,7 @@ below. These libraries can extend LangGraph's functionality in various ways.
 
 ## 📚 Available Libraries
 
+[//]: # (This file is automatically generated using a script in docs/_scripts. Do not edit this file directly!)
 {library_list}
 
 ## ✨ Contributing Your Library

docs/_scripts/third_party_page/packages.yml

@@ -3,3 +3,6 @@ packages:
   - name: "trustcall"
     repo: "hinthornw/trustcall"
     description: "Tenacious tool calling built on LangGraph"
+  - name: "langgraph-supervisor"
+    repo: "langchain-ai/langgraph-supervisor"
+    description: "Build supervisor multi-agent systems with LangGraph"