added machine learning playlist in tamil course section (#7735)

* Update free-courses-ta.md

Added some good machine learning playlist in Tamil!

* Update free-courses-ta.md

Added some good Machine learning playlist in Tamil.

* Update free-courses-ta.md

Added some good Machine learning playlist in Tamil.

courses/free-courses-ta.md

@@ -7,6 +7,7 @@
 * [HTML and CSS](#html-and-css)
 * [Java](#java)
 * [JavaScript](#javascript)
+* [Machine Learning](#machinelearning)
 * [PHP](#php)
 * [Python](#python)
 * [SQL](#sql)
@@ -54,6 +55,12 @@
 * [JavaScript in Tamil](https://youtube.com/playlist?list=PL73Obo20O_7ihsIM5K-hHYPrcqkkdQcLa) - CyberDude Networks Pvt. Ltd.
 
 
+### Machine Learning
+
+* [Introduction to Machine Learning(Tamil)](https://www.youtube.com/playlist?list=PLyqSpQzTE6M-9thAeyB2mRFYvvW8AWxXX) - IIT Madras NPTEL
+* [Machine Learning in Tamil](https://www.youtube.com/playlist?list=PLJtSFa-YIedYu2QfQaHJJBLT096RxtMHD) - Majaa Matrix
+
+
 ### PHP
 
 * [PHP for beginners In Tamil](https://youtube.com/playlist?list=PL4unWLKFsZfcq_D-sEy0pR4Sl_yipy6Jt) - Tutor Joe's Stanley