feat: add go func img content in readme (#1)

README.md

@@ -1,8 +1,15 @@
 ## Welcome to GoFuncs
 
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 A curated list of delightful <a href="https://github.com/codesnail21/gofuncs">Golang Functions</a>
 functions and libraries. For more awesomeness, check
 out <a href="https://github.com/codesnail21/gofuncs">awesome</a>.
 <br/>
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 [![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg)](https://github.com/sindresorhus/awesome)
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+<br/>
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+![image](https://user-images.githubusercontent.com/87218847/181223942-6d273aa8-cc0a-4eb6-aabb-21453c76fabb.png)
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