update readme

README.md

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 <img alt="golang generic graph package" src="https://user-images.githubusercontent.com/11541936/221823924-358994d2-44ff-4236-bbc8-b404de62293e.png" style="width:40%" align="right" title="gograph"/>
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-<p>GoGraph is a Golang generic graph library that provides mathematical graph theory and algorithms.
-It can be used as an external library in production.</p> 
-<p>In addition, it is a helpful resource for those who want to prepare for interviews.</p>
+<p>GoGraph is a lightweight, efficient, and easy-to-use graph data structure <br/>
+implementation written in Go. It provides a versatile framework for representing <br/>
+graphs and performing various operations on them, making it ideal for both <br/>
+educational purposes and practical applications.</p>
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 ## Table of Contents