Update README with LeetCode Daily Challenge

Author: jeremymanning

README.md

@@ -35,6 +35,7 @@ Each day (ideally) we'll attempt the daily [leetcode](https://leetcode.com) prob
 | July 24, 2024 | [2191](https://leetcode.com/problems/sort-the-jumbled-numbers/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/2191) | 🟡 Medium |
 | July 25, 2024 | [912](https://leetcode.com/problems/sort-an-array/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/912) | 🟡 Medium |
 | July 26, 2024 | [1334](https://leetcode.com/problems/find-the-city-with-the-smallest-number-of-neighbors-at-a-threshold-distance/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/1334) | 🟡 Medium |
+| July 27, 2024 | [2976](https://leetcode.com/problems/minimum-cost-to-convert-string-i/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/2976) | 🟡 Medium |
 
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