Added a module to requirement.txt

requirements.txt

@@ -1,6 +1,5 @@
-langchain_community>=0.0.3
-langchain>=0.0.240
+langchain-openai>=0.1.0
+langchain-core>=0.2.7
 gradio>=3.39.0
-openai>=0.27.8
+requests>=2.28.2
 python-dotenv>=1.0.0
-requests>=2.28.2