bump langgraph (#438)

Author: vbarda

poetry.lock

@@ -16,8 +16,7 @@ langchain-community = ">=0.3.0,<0.4.0"
 langchain-openai = ">=0.3.12,<0.4.0"
 langchain-anthropic = ">=0.3.10,<0.4.0"
 langchain-weaviate = ">=0.0.3,<0.1.0"
-# TODO: fix rendering in langgraph and update constraint
-langgraph = ">=0.4"
+langgraph = ">=0.4.5"
 beautifulsoup4 = "^4.12.2"
 weaviate-client = "^4.0.0"
 lxml = "^4.9.3"