Update README with LeetCode Daily Challenge

Author: jeremymanning

README.md

@@ -287,6 +287,7 @@ _**Note:** Our group is currently taking a break from grinding leetcode. The tab
 | March 31, 2025 | [2551](https://leetcode.com/problems/put-marbles-in-bags/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/2551) | 🔴 Hard |
 | April 1, 2025 | [2140](https://leetcode.com/problems/solving-questions-with-brainpower/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/2140) | 🟡 Medium |
 | April 2, 2025 | [2873](https://leetcode.com/problems/maximum-value-of-an-ordered-triplet-i/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/2873) | 🟢 Easy |
+| April 3, 2025 | [2874](https://leetcode.com/problems/maximum-value-of-an-ordered-triplet-ii/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/2874) | 🟡 Medium |
 
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