Update README with LeetCode Daily Challenge

Author: jeremymanning

README.md

@@ -90,6 +90,7 @@ _**Note:** Our group is currently taking a break from grinding leetcode. The tab
 | September 15, 2024 | [1371](https://leetcode.com/problems/find-the-longest-substring-containing-vowels-in-even-counts/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/1371) | 🟡 Medium |
 | September 16, 2024 | [539](https://leetcode.com/problems/minimum-time-difference/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/539) | 🟡 Medium |
 | September 17, 2024 | [884](https://leetcode.com/problems/uncommon-words-from-two-sentences/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/884) | 🟢 Easy |
+| September 18, 2024 | [179](https://leetcode.com/problems/largest-number/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/179) | 🟡 Medium |
 
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