Update requirements.txt

requirements.txt

@@ -1,8 +1,8 @@
 langchain>=1.0.0
 langgraph>=1.0.0
-langchain-chroma>=0.1.0
-langchain-ollama>=0.1.0
-langchain-core>=0.1.0
-python-dotenv>=1.0.0
-httpx>=0.27.0
-pydantic>=2.0.0
+langchain-ollama
+langchain-chroma
+langchain-text-splitters
+langchain-tools
+httpx
+python-dotenv