Added one useful resource for

Hey, I've added a useful reference link for DSA in the Data structure section, I think this will best add to your content and give your readers a more diverse understanding of the topic. I hope you will like this. Thank you.

README.md

@@ -39,6 +39,7 @@ But knowing the stuff will help you become better! :muscle:*
 - [Foundations of Data Structures - EDX](https://www.edx.org/course/foundations-data-structures-iitbombayx-cs213-1x-0#!)
 - [Data Structures - Coursera](https://www.coursera.org/learn/data-structures)
 - [Mathematics for Computer Science - Eric Lehman](https://courses.csail.mit.edu/6.042/spring17/mcs.pdf)
+- [Learn Data Structures and Algorithms](https://www.scaler.com/topics/data-structures/)
 
 ### Numbers
 - :book: [How to Count](https://www.goodreads.com/book/show/12093869-how-to-count)