Challenge 15 - Added my name in challengers list.

Rishav986 · Rishav986 · commit 34f749b3ab5a · 2022-09-15T15:18:24.000+05:30
Signed-off-by: Rishav986 &lt;starsiwach132003@gmail.com&gt;
diff --git a/challengers-list.md b/challengers-list.md
@@ -1,3 +1,4 @@
 # List of challengers
 1. [Mrinal](https://github.com/mrinal1224)
 2. [Shivay](https://github.com/shivaylamba)
+3. [Rishav](https://github.com/Rishav986)
