Update README.md

Author: devmamunur

README.md

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+<h1 align="center">
+  Advanced JavaScript Guide
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+ This repository is designed to enhance your JavaScript proficiency and prepare you effectively for job interviews.
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+<br>
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 ## Table of Contents
 - **[Basic JavaScript](#basic-javascript) 🌟**
 - **[Intermediate JavaScript](#intermediate-javascript) 🚀**