Update README.md

Author: ariestiyansyah

README.md

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 # Dark Switch
 
+<a href="https://www.producthunt.com/posts/dark-switch?utm_source=badge-featured&utm_medium=badge&utm_souce=badge-dark-switch" target="_blank"><img src="https://api.producthunt.com/widgets/embed-image/v1/featured.svg?post_id=151770&theme=dark" alt="Dark Switch - Switch MacOS dark mode in one click | Product Hunt Embed" style="width: 250px; height: 54px;" width="250px" height="54px" /></a>
+
 Easily switch dark mode in macOS mojave.
 
 ## Preview