Update README - Topic Tags

README.md

@@ -21,6 +21,7 @@ A collection of LeetCode questions to ace the coding interview! - Created using
 | [1580-shuffle-the-array](https://github.com/g0rdonL/leetcode-solutions/tree/master/1580-shuffle-the-array) |
 | [1603-running-sum-of-1d-array](https://github.com/g0rdonL/leetcode-solutions/tree/master/1603-running-sum-of-1d-array) |
 | [1635-number-of-good-pairs](https://github.com/g0rdonL/leetcode-solutions/tree/master/1635-number-of-good-pairs) |
+| [1791-richest-customer-wealth](https://github.com/g0rdonL/leetcode-solutions/tree/master/1791-richest-customer-wealth) |
 | [2048-build-array-from-permutation](https://github.com/g0rdonL/leetcode-solutions/tree/master/2048-build-array-from-permutation) |
 | [2058-concatenation-of-array](https://github.com/g0rdonL/leetcode-solutions/tree/master/2058-concatenation-of-array) |
 | [2137-final-value-of-variable-after-performing-operations](https://github.com/g0rdonL/leetcode-solutions/tree/master/2137-final-value-of-variable-after-performing-operations) |
@@ -61,4 +62,8 @@ A collection of LeetCode questions to ace the coding interview! - Created using
 |  |
 | ------- |
 | [1708-design-parking-system](https://github.com/g0rdonL/leetcode-solutions/tree/master/1708-design-parking-system) |
+## Matrix
+|  |
+| ------- |
+| [1791-richest-customer-wealth](https://github.com/g0rdonL/leetcode-solutions/tree/master/1791-richest-customer-wealth) |
 <!---LeetCode Topics End-->