README: fix license badge image link

e1f66c9 changed
the aur package name to spotube-bin, so the badge link
also needs to be updated.

README.md

@@ -8,7 +8,7 @@
     <img alt="GitHub release" src="https://img.shields.io/github/v/release/KRTirtho/spotube?color=%2316ba58&style=flat-square"/>
   </a>
   <a href="LICENSE">
-    <img alt="License" src="https://img.shields.io/aur/license/spotube?color=%2316ba58&style=flat-square"/>
+    <img alt="License" src="https://img.shields.io/aur/license/spotube-bin?color=%2316ba58&style=flat-square"/>
   </a>
   <a href="https://github.com/KRTirtho">
     <img alt="Maintainer" src="https://img.shields.io/badge/Maintainer-KRTirtho-%2316ba58?style=flat-square"/>
@@ -178,4 +178,4 @@ Bu why? You can learn about it [here](https://dev.to/krtirtho/choosing-open-sour
 Follow me on [Twitter](https://twitter.com/@krtirtho) for newer updates about this application
 
 
-<p align="center">&copy; 2022 Spotube</p>
+<p align="center">&copy; 2022 Spotube</p>