Update README.md

Author: sadanandpai

README.md

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-	<h1>JavaScript Modern Interview Code Challenges 2021</h1>
+	<h1>JavaScript Modern Interview Code Challenges</h1>
 	<h3>Collection of modern interview code challenges on JavaScript suitable for</h3>
     	<h4>Interviewees | Interviewers | Knowledge test | Practice</h4>
     	<a href="#javascript-modern-interview-code-challenges-by-topic"><img src="banner.png" alt="banner" width="500px"/></a>