docs(readme): Update badge for capacitor 5 support (#13)

README.md

@@ -6,7 +6,7 @@
 </p>
 
 <p align="center">
-  <img src="https://img.shields.io/badge/capacitor%20v4%20support-yes-brightgreen?logo=Capacitor&style=flat-square" />
+  <img src="https://img.shields.io/badge/capacitor%20v5%20support-yes-brightgreen?logo=Capacitor&style=flat-square" />
   <img src="https://img.shields.io/maintenance/yes/2023?style=flat-square" />
   <a href="https://github.com/capacitor-community/screen-brightness/actions?query=workflow%3A%22Test+and+Build+Plugin%22"><img src="https://img.shields.io/github/actions/workflow/status/capacitor-community/screen-brightness/ci.yml?Test%20and%20Build%20Plugin?style=flat-square" /></a>
   <a href="https://www.npmjs.com/package/@capacitor-community/screen-brightness"><img src="https://img.shields.io/npm/l/@capacitor-community/screen-brightness?style=flat-square" /></a>