Minor change: Updated Course Name (#2207)

Course name is MTH101 and not MTS 101

free-programming-books.md

@@ -425,7 +425,7 @@
 * [Linear Algebra: An Introduction to Mathematical Discourse](https://en.wikibooks.org/wiki/Linear_Algebra) - Jim Hefferon
 * [Linear Algebra, Theory And Applications](https://www.math.byu.edu/klkuttle/linearalgebra.pdf) - Kenneth Kuttler (PDF)
 * [Mathematical Logic - an Introduction](http://www.ii.uib.no/~michal/und/i227/book/book.pdf) (PDF)
-* [Mathematics, MTS 101A](http://home.iitk.ac.in/~psraj/mth101/) - P. Shunmugaraj, IIT Kanpur
+* [Mathematics, MTH101A](http://home.iitk.ac.in/~psraj/mth101/) - P. Shunmugaraj, IIT Kanpur
 * [Notes on Differential Equations](http://www.math.cornell.edu/~bterrell/dn.pdf) - Robert E. Terrell (PDF)
 * [Number Theory](https://github.com/holdenlee/number-theory) - Holden Lee MIT
 * [OpenIntro Statistics](https://www.openintro.org/stat/textbook.php)