Update README with LeetCode Daily Challenge

Author: jeremymanning

README.md

@@ -42,6 +42,7 @@ This means you'll always find an AI-generated solution to compare with or learn
 | November 20, 2025 | [757](https://leetcode.com/problems/set-intersection-size-at-least-two/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/757) | 🔴 Hard |
 | November 21, 2025 | [1930](https://leetcode.com/problems/unique-length-3-palindromic-subsequences/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/1930) | 🟡 Medium |
 | November 22, 2025 | [3190](https://leetcode.com/problems/find-minimum-operations-to-make-all-elements-divisible-by-three/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/3190) | 🟢 Easy |
+| November 23, 2025 | [1262](https://leetcode.com/problems/greatest-sum-divisible-by-three/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/1262) | 🟡 Medium |
 
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