updating DIRECTORY.md

Author: Abhi-sheKkK

DIRECTORY.md

@@ -1260,6 +1260,7 @@
   * [Recursive Insertion Sort](sorts/recursive_insertion_sort.py)
   * [Recursive Mergesort Array](sorts/recursive_mergesort_array.py)
   * [Recursive Quick Sort](sorts/recursive_quick_sort.py)
+  * [Reverse Selection Sort](sorts/reverse_selection_sort.py)
   * [Selection Sort](sorts/selection_sort.py)
   * [Shell Sort](sorts/shell_sort.py)
   * [Shrink Shell Sort](sorts/shrink_shell_sort.py)