Update requirements.txt

requirements.txt

@@ -1,5 +1,5 @@
-ctransformers==0.2.27
-fastapi==0.110.0
-uvicorn==0.29.0
-huggingface_hub==0.23.0
+llama-cpp-python==0.2.87 --extra-index-url https://abetlen.github.io/llama-cpp-python/whl/cpu
+fastapi
+uvicorn
+huggingface_hub
 pydantic==1.10.15