Standize C++ Headings (#5275)

courses/free-courses-hi.md

@@ -2,7 +2,7 @@
 
 * [Android](#Android)
 * [C](#C)
-* [C++](#C++)
+* [C++](#cpp)
 * [Data Structures](#DataStructures)
 * [DevOps](#DevOps)
 * [Java](#Java)
@@ -27,7 +27,7 @@
 * [C Language Tutorials In Hindi](https://www.youtube.com/playlist?list=PLu0W_9lII9aiXlHcLx-mDH1Qul38wD3aR) - CodeWithHarry
 
 
-### C++
+<h3 id="cpp">C++</h3>
 
 * [C++ Full Course | C++ Tutorial \| Data Structures & Algorithms](https://www.youtube.com/playlist?list=PLfqMhTWNBTe0b2nM6JHVCnAkhQRGiZMSJ) - Apna College
 * [C++ Programming in Hindi](https://www.youtube.com/playlist?list=PLDA2q3s0-n15yszaZ2yRKEoxY-WWkuAt4) - Sumit Bisht (Edutainment 1.0)