Update requirements.txt

requirements.txt

@@ -1,8 +1,9 @@
-gradio==4.44.0
-langchain==0.2.16
-langgraph==0.2.14
-langchain-community==0.2.10
-langchain-openai==0.1.21
-tavily-python==0.3.4
-pydantic==2.11.1
-openai==1.40.2
+gradio==4.44.0
+langchain==0.2.16
+langgraph==0.2.14
+langchain-community==0.2.10
+langchain-openai==0.1.21
+tavily-python==0.3.4
+pydantic==2.11.1
+openai==1.40.2
+langchain-google-genai