Update README.md

Author: javendanoarb

README.md

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 # Robotics Playground [![View Robotics Playground on File Exchange](https://www.mathworks.com/matlabcentral/images/matlab-file-exchange.svg)](https://www.mathworks.com/matlabcentral/fileexchange/67157-robotics-playground) [![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-robotics/robotics-playground&file=RPInstall.mlx) 
-[Open in MATLAB Online](https://matlab.mathworks.com/open/github/v1?repo=mathworks-robotics/robotics-playground&file=RPInstall.mlx)
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 Copyright 2019 The MathWorks, Inc.
 # Description