Update README with LeetCode Daily Challenge

Author: jeremymanning

README.md

@@ -164,6 +164,7 @@ _**Note:** Our group is currently taking a break from grinding leetcode. The tab
 | November 28, 2024 | [2290](https://leetcode.com/problems/minimum-obstacle-removal-to-reach-corner/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/2290) | 🔴 Hard |
 | November 29, 2024 | [2577](https://leetcode.com/problems/minimum-time-to-visit-a-cell-in-a-grid/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/2577) | 🔴 Hard |
 | November 30, 2024 | [2097](https://leetcode.com/problems/valid-arrangement-of-pairs/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/2097) | 🔴 Hard |
+| December 1, 2024 | [1346](https://leetcode.com/problems/check-if-n-and-its-double-exist/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/1346) | 🟢 Easy |
 
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