Update requirements.txt

requirements.txt

@@ -1,6 +1,3 @@
-langchain==0.3.0
-langchain-community==0.3.0
-langchain-huggingface==0.1.0
-faiss-cpu
-sentence-transformers
-gradio
+gradio>=4.44.1
+huggingface_hub>=0.24.0
+python-dotenv