chore: Fix for the github actions badge in the readme

Author: ZeeCoder

README.md

@@ -10,7 +10,7 @@
 A React hook that allows you to use a ResizeObserver to measure an element's size.
 
 [![npm version](https://badge.fury.io/js/use-resize-observer.svg)](https://npmjs.com/package/use-resize-observer)
-![build](https://github.com/ZeeCoder/use-resize-observer/workflows/Testing/badge.svg?branch=master)
+![build](https://github.com/ZeeCoder/use-resize-observer/workflows/Testing/badge.svg)
 [![BrowserStack Status](https://automate.browserstack.com/badge.svg?badge_key=bTAyOUVpa3hENUgwMkJBTVhXcytCQjREangwcTJqT0czUGhRSEZta3ZwYz0tLVRSZ1NhVkdPZ01FMithOEh5ZGxoWHc9PQ==--49d9d8ad43d557894fb270c80fd1c24107a82f51)](https://automate.browserstack.com/public-build/bTAyOUVpa3hENUgwMkJBTVhXcytCQjREangwcTJqT0czUGhRSEZta3ZwYz0tLVRSZ1NhVkdPZ01FMithOEh5ZGxoWHc9PQ==--49d9d8ad43d557894fb270c80fd1c24107a82f51)
 
 ## Highlights