docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -59,6 +59,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
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  <td align="center"><a href="https://github.com/swastikchugh"><img src="https://avatars0.githubusercontent.com/u/17880938?v=4" width="100px;" alt=""/><br /><sub><b>swastikchugh</b></sub></a><br /><a href="https://github.com/ephremdeme/data-structure-and-algorithms/commits?author=swastikchugh" title="Code">💻</a></td>
+ <td align="center"><a href="https://github.com/Palak-137"><img src="https://avatars0.githubusercontent.com/u/54790525?v=4" width="100px;" alt=""/><br /><sub><b>Lethal_Moana</b></sub></a><br /><a href="https://github.com/ephremdeme/data-structure-and-algorithms/commits?author=Palak-137" title="Code">💻</a></td>
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