Add contributor: FahimFBA

Author: Tahanima

CONTRIBUTORS.md

@@ -7,5 +7,6 @@
     <td align="center"><a href="https://github.com/Amisha328"><img src="https://avatars.githubusercontent.com/u/58816552?v=4" width="100px;" alt=""/><br /><sub><b>Amisha Sahu</b></sub></a><br /><a href="https://github.com/Tahanima/leetcode-solution-curation/commits?author=Amisha328" title="Contribution">📖</a></td>
     <td align="center"><a href="https://github.com/r8025n"><img src="https://avatars.githubusercontent.com/u/43141944?v=4" width="100px;" alt=""/><br /><sub><b>Hasin Raihan Shovon</b></sub></a><br /><a href="https://github.com/Tahanima/leetcode-solution-curation/commits?author=r8025n" title="Contribution">📖</a></td>
     <td align="center"><a href="https://github.com/jabertuhin"><img src="https://avatars.githubusercontent.com/u/22750032?v=4" width="100px;" alt=""/><br /><sub><b>Jaber Tuhin</b></sub></a><br /><a href="https://github.com/Tahanima/leetcode-solution-curation/commits?author=jabertuhin" title="Contribution">📖</a></td>
+    <td align="center"><a href="https://github.com/FahimFBA"><img src="https://avatars.githubusercontent.com/u/64195132?v=4" width="100px;" alt=""/><br /><sub><b>Md. Fahim Bin Amin</b></sub></a><br /><a href="https://github.com/Tahanima/leetcode-solution-curation/commits?author=FahimFBA" title="Contribution">📖</a></td>
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