udpate README.md

Author: charlesmartin14

README.md

@@ -43,12 +43,17 @@ And in the notebooks provided in the [examples](https://github.com/CalculatedCon
 pip install weightwatcher
 ```
 
+if this fails try
+
 ### Current TestPyPI Version: 0.7.3.5
 
 ```sh
  python3 -m pip install --index-url https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple weightwatcher
  ```
 
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 ## Usage
 
 ```python