Update requirements.txt to remove duckduckgo-search dependency

requirements.txt

@@ -1,16 +1,15 @@
-gradio>=4.14.0
+gradio>=4.0.0
 requests>=2.31.0
 beautifulsoup4>=4.12.2
-transformers>=4.36.0
+transformers>=4.35.2
 --extra-index-url https://download.pytorch.org/whl/cpu
 torch>=2.2.0+cpu
-duckduckgo-search>=4.4.3
-langchain>=0.1.0
-langchain-community>=0.0.10
-sentence-transformers>=2.5.1
+langchain>=0.0.350
+langchain-community>=0.0.6
+sentence-transformers>=2.2.2
 numpy>=1.26.0
 tqdm>=4.66.0
-lxml>=5.1.0
+lxml>=4.9.3
 protobuf>=4.25.2
 accelerate>=0.26.1
 faiss-cpu>=1.7.4