Update README.md

Author: Andy-jqa

README.md

@@ -19,7 +19,7 @@ export OPENAI_ENDPOINT=YOUR_AZURE_OPENAI_ENDPOINT_URL
 export OPENAI_API_KEY=YOUR_AZURE_OPENAI_API_KEY
 ```
 
-The code has been tested with Python 3.9.13 using CentOS Linux release 7.9.2009 (Core). Please install the required Python packages by:
+The code has been tested with Python 3.9.13 using CentOS Linux release 7.9.2009 (Core). Please install the required Python packages by (it should take less than 10 minutes on a modern machine):
 
 ```bash
 pip install -r requirements.txt