Added separate sections for Data Structures and Algorithms section in free-programming-books-hi.md

solves EbookFoundation#7323

Author: vishal-sharma-369

Diff for: books/free-programming-books-hi.md

@@ -25,9 +25,13 @@
 
 ### Data Structure and Algorithms
 
+#### Data Structures
+
 * [Data Structure with C \| Hindi](http://www.bccfalna.com/IOC-AllEBooks/DSnAinHindi.pdf) - Kuldeep Chand (PDF)
 
 
+#### Algorithms
+
 ### Java
 
 * [Java \| Hindi](https://www.learnhindituts.com/java) - LearnHindiTuts.com