Update README.md

Author: vboutrou

README.md

@@ -5,7 +5,7 @@ Learn how to calculate derivatives, understand and use the product and chain rul
 
 [![View on File Exchange](https://www.mathworks.com/matlabcentral/images/matlab-file-exchange.svg)](https://www.mathworks.com/matlabcentral/fileexchange/99249-calculus-derivatives) or [![Open in MATLAB Online](https://www.mathworks.com/images/responsive/global/open-in-matlab-online.svg)](https://matlab.mathworks.com/open/github/v1?repo=MathWorks-Teaching-Resources/Calculus-Derivatives&project=Derivatives.prj&file=README.mlx)
 
-[![MATLAB Versions Tested](https://img.shields.io/endpoint?url=https%3A%2F%2Fraw.githubusercontent.com%2FMathWorks-Teaching-Resources%2FCalculus-Derivatives%2Frelease%2FImages%2FTestedWith.json)](https://MathWorks-Teaching-Resources.github.io/Calculus-Derivatives)
+[![MATLAB Versions Tested](https://img.shields.io/endpoint?url=https://mathworks-teaching-resources.github.io/Calculus-Derivatives/TestedWith.json)](https://MathWorks-Teaching-Resources.github.io/Calculus-Derivatives)
 
 **Curriculum Module**