"Update build badge in README.md"

Author: OseMine

README.md

@@ -1,5 +1,5 @@
 # Variable Filter Plugin
-[![Build](https://github.com/OseMine/variable-filter/actions/workflows/automated-prerelease.yml)]
+[![Build](https://github.com/OseMine/variable-filter/actions/workflows/build.yml/badge.svg)](https://github.com/OseMine/variable-filter/actions/workflows/build.yml)
 
 [![Latest Release](https://img.shields.io/github/v/release/OseMine/variable-filter?style=flat)]