Update README with LeetCode Daily Challenge

Author: jeremymanning

README.md

@@ -38,6 +38,7 @@ This means you'll always find an AI-generated solution to compare with or learn
 | November 16, 2025 | [1513](https://leetcode.com/problems/number-of-substrings-with-only-1s/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/1513) | 🟡 Medium |
 | November 17, 2025 | [1437](https://leetcode.com/problems/check-if-all-1s-are-at-least-length-k-places-away/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/1437) | 🟢 Easy |
 | November 18, 2025 | [717](https://leetcode.com/problems/1-bit-and-2-bit-characters/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/717) | 🟢 Easy |
+| November 19, 2025 | [2154](https://leetcode.com/problems/keep-multiplying-found-values-by-two/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/2154) | 🟢 Easy |
 
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