added file exchange link to readme

Author: callieEDU

README.md

@@ -1,5 +1,5 @@
 # Robotic Manipulators 
-[![View <File Exchange Title> on File Exchange](https://www.mathworks.com/matlabcentral/images/matlab-file-exchange.svg)](https://www.mathworks.com/matlabcentral/fileexchange/) 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/Robotic-Manipulators&project=Robotic-Manipulators.prj)
+[![View <File Exchange Title> on File Exchange](https://www.mathworks.com/matlabcentral/images/matlab-file-exchange.svg)](https://www.mathworks.com/matlabcentral/fileexchange/130124-robotic-manipulators) 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/Robotic-Manipulators&project=Robotic-Manipulators.prj)
 
 **Curriculum Module**  
 _Created with R2022b. Compatible with R2022b and later releases._