Add Matlab cheat sheet (#8073)

more/free-programming-cheatsheets.md

@@ -265,6 +265,7 @@
 ### MATLAB
 
 * [MATLAB Basic Functions Reference Sheet](https://www.mathworks.com/content/dam/mathworks/fact-sheet/matlab-basic-functions-reference.pdf) - MathWorks (PDF)
+* [Matlab Cheat Sheet](https://sites.nd.edu/gfu/files/2019/07/cheatsheet.pdf) - Thor Nielsen (PDF)
 
 
 ### MongoDB