Use langchain branch

Author: hoodmane

packages/setup.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-git clone https://github.com/hoodmane/pyodide-recipes.git -b fastapi --depth 1
+git clone https://github.com/hoodmane/pyodide-recipes.git -b langchain --depth 1
 
 ln -s pyodide-recipes/packages packages