docs: typo

Author: xiCO2k

README.md

@@ -3,7 +3,7 @@
 </h1>
 
 <p align="center">
-    <a href="https://github.com/xiCO2k/laravel-vue-i18n/actions"><img alt="GitHub Workflow Status (master)" src="https://img.shields.io/github/workflow/status/xiCO2k/laravel-vue-i18n/Tests/master"></a>
+    <a href="https://github.com/xiCO2k/laravel-vue-i18n/actions"><img alt="GitHub Workflow Status (master)" src="https://img.shields.io/github/workflow/status/xiCO2k/laravel-vue-i18n/Tests/main"></a>
     <a href="https://www.npmjs.com/package/laravel-vue-i18n"><img alt="License" src="https://img.shields.io/npm/l/laravel-vue-i18n.svg?sanitize=true"></a>
 </p>