Addes some free sinhala language resources (#7926)

* Addes some resources in sinhala language

* removed trailing slash on last edited sinhala resources file

* added some sinhala language resources

* updated

* added some sinhala language resources

* added some sinhala language resources

* Update courses/free-courses-si.md

* alphabetize, remove non-course

* Update courses/free-courses-si.md

* while I'm at it, remove (youtube)

* blanks

Co-authored-by: Eric Hellman <eric@hellman.net>

courses/free-courses-si.md

@@ -1,40 +1,42 @@
 ### Index
 
 * [ASP.NET Core](#aspnet-core)
+* [C#](#csharp)
 * [HTML and CSS](#html-and-css)
 * [Java](#java)
 * [JavaScript](#javascript)
     * [React](#react)
-* [C#](#csharp)
 
 
 ### ASP.NET Core
 
-* [WEB API-ASP.NET Core in Sinhala](https://youtube.com/playlist?list=PLvvtf05eMZ2CpeAsq93DqWJHHyvCSa2Qn) - Fiqri Ismail (YouTube)
+* [WEB API-ASP.NET Core in Sinhala](https://youtube.com/playlist?list=PLvvtf05eMZ2CpeAsq93DqWJHHyvCSa2Qn) - Fiqri Ismail
+
+
+### <a id="csharp"></a>C\#
+
+* [C# Full Course in Sinhala](https://youtube.com/playlist?list=PLvvtf05eMZ2CXD2JdZgSBgyl13ODqHOkO) - Fiqri Ismail
 
 
 ### HTML and CSS
 
-* [HTML සිංහලෙන්](https://youtube.com/playlist?list=PLWAgeLqk4SjDlN6nHs91rECgx4PbzfoZh) - SL Geek School (YouTube)
+* [HTML සිංහලෙන්](https://youtube.com/playlist?list=PLWAgeLqk4SjDlN6nHs91rECgx4PbzfoZh) - SL Geek School
 
 
 ### Java
 
 * [Object Oriented Programming ](https://youtube.com/playlist?list=PLqeCu_1ZdDl63h6YR3QsxcGOB7yDS7i3b) - LankaDroid Programming Kuppiya (YouTube)
-* [Sinhala Java Netbeans Lessons](https://youtube.com/playlist?list=PLA3ZeQncjeVu9VHevp2SmPCQ9muVO3fEB) - Chanux Bro (YouTube)
+* [Sinhala Java Netbeans Lessons](https://youtube.com/playlist?list=PLA3ZeQncjeVu9VHevp2SmPCQ9muVO3fEB) - Chanux Bro
 
 
 ### JavaScript
 
-* [JavaScript Tutorial in Sinhala](https://youtube.com/playlist?list=PLYmyc7wRFoQjxkHAzHh1UIdU7ZdjTQvQt) - BestJobsLK (YouTube)
+* [JavaScript Tutorial in Sinhala](https://youtube.com/playlist?list=PLYmyc7wRFoQjxkHAzHh1UIdU7ZdjTQvQt) - BestJobsLK
 
 
 #### React
 
-* [Fundamentals \| React JS in Sinhala](https://youtube.com/playlist?list=PLvvtf05eMZ2DpDyWwmAjEuicvVxx4vIYB) - Fiqri Ismail (YouTube)
-* [REACT | MERN CRUD App in Sinhala](https://youtube.com/playlist?list=PLtoqJbwHBeHzAooLCGOzYVE9mkAeCnT9y) - Haritha Weerathunga (YouTube)
-
+* [Fundamentals \| React JS in Sinhala](https://youtube.com/playlist?list=PLvvtf05eMZ2DpDyWwmAjEuicvVxx4vIYB) - Fiqri Ismail
+* [MERN Stack Developer - Beginners](https://www.youtube.com/playlist?list=PLvfC6i-hEZBnqqF7giszuYI0iqenU5NY0) -  TechWithGeorge
+* [REACT | MERN CRUD App in Sinhala](https://youtube.com/playlist?list=PLtoqJbwHBeHzAooLCGOzYVE9mkAeCnT9y) - Haritha Weerathunga
 
-### <a id="csharp"></a>C\#
-
-* [C# Full Course in Sinhala](https://youtube.com/playlist?list=PLvvtf05eMZ2CXD2JdZgSBgyl13ODqHOkO) - Fiqri Ismail