fix: spelling error in CONTRIBUTING.md (TheAlgorithms#1531)

Co-authored-by: David Leal <halfpacho@gmail.com>

Author: mishraabhinn

CONTRIBUTING.md

@@ -113,7 +113,7 @@ bool func(int param1, T param2) {
  * @returns void
  */
 static void test() {
-    /* desciptions of the following test */
+    /* descriptions of the following test */
     assert(func(...) == ...); // this ensures that the algorithm works as expected
 
     // can have multiple checks