Update README.md

Author: DevOgabek

README.md

@@ -231,4 +231,5 @@ This project is licensed under the MIT License - see the [LICENSE](LICENSE) file
 - [Remove Duplicates from Sorted Array](Python/remove_duplicates_from_sorted_array.py)
 - [Subarrays with K Different Integers](Python/subarrays_with_k_different_integers.py)
 - [Count Subarrays With Fixed Bounds](Python/count_subarrays_with_fixed_bounds.py)
-- [Length of Last Word](Python/length_of_last_word.py)
+- [Length of Last Word](Python/length_of_last_word.py)
+- [Isomorphic Strings](Python/isomorphic_strings.py)