fix pip install instructions

README.md

@@ -28,7 +28,7 @@ python -m venv .venv
 source .venv/bin/activate
 
 # Install the dependencies
-pip install -r requirements
+pip install -r requirements.txt
 ```
 
 For additional configuration, check out HuggingFace's [spaces configuration reference](https://huggingface.co/docs/hub/spaces-config-reference).