Standize C++ Headings (#5275)

casts/free-podcasts-screencasts-en.md

@@ -2,7 +2,7 @@
 
 * [Android](#android)
 * [C#](#c)
-* [C++](#c-1)
+* [C++](#cpp)
 * [Clojure](#clojure)
 * [Common Lisp](#common-lisp)
 * [CSS](#css)
@@ -43,7 +43,7 @@
 * [How to program in C# - Beginner Course \| Brackeys](https://www.youtube.com/playlist?list=PLPV2KyIb3jR6ZkG8gZwJYSjnXxmfPAl51) (screencast)
 
 
-### C++
+<h3 id="cpp">C++</h3>
 
 * [C++ Programming Video Lectures](https://www.youtube.com/playlist?list=PLTZbNwgO5ebo64D1k0DJQGX30X6iSTmRr) (screencast)
 * [C++ STL](https://www.youtube.com/playlist?list=PL5jc9xFGsL8G3y3ywuFSvOuNm3GjBwdkb) (screencast)