solving issue: Competitive Programming #8288 (#8323)

* solving issue: Competitive Programming #8288

Added "Striver’s CP Sheet" in the Competitive Programming section | issue: Competitive Programming #8288
- Update problem-sets-competitive-programming.md

* Alphabetical ordering done - issue #8288

Fix the Alphabetical order.

more/problem-sets-competitive-programming.md

@@ -47,6 +47,7 @@
 * [Newton School](https://my.newtonschool.co/contest/all)
 * [oj.uz](https://oj.uz)
 * [Sphere Online Judge](http://www.spoj.com/contests)
+* [Striver’s CP Sheet](https://takeuforward.org/interview-experience/strivers-cp-sheet/)
 * [Techgig](https://www.techgig.com)
 * [Topcoder](https://www.topcoder.com)
 * [Toph](https://toph.co)