Update requirements.txt

requirements.txt

@@ -1,8 +1,8 @@
 streamlit==1.35.0
-langgraph==0.1.0  # Older but stable version
-langchain-groq==0.1.0  # Compatible version
+langgraph==0.2.53  # Latest stable version
+langchain-groq==0.1.4  # Compatible version
 tavily-python==0.5.1
 plotly==5.22.0
 python-multipart==0.0.9
-langchain-community==0.0.20  # Compatible version
-langchain-core==0.1.45  # Base version for compatibility
+langchain-community==0.0.34  # Compatible version
+langchain-core==0.2.43  # Explicit version for compatibility