Update requirements.txt

requirements.txt

@@ -1,7 +1,6 @@
-langchain>=0.1.0
-langchain-community>=0.0.5
-langchain-openai>=0.0.5
-gradio>=3.50.0
-PyPDF2>=3.0.1
-chromadb>=0.4.22
-google-generativeai>=0.3.0
+gradio==3.50.0
+PyMuPDF==1.21.1
+faiss-cpu==1.8.0
+google-generativeai==0.3.0
+numpy==1.26.0
+scikit-learn==1.2.2