Fix link to build status badge of master branch

README.md

@@ -1,6 +1,6 @@
 ![Metafacture](https://raw.github.com/wiki/metafacture/metafacture-core/img/metafacture.png)
 
-[![Build](https://github.com/metafacture/metafacture-core/workflows/Build/badge.svg?branch=master)](https://github.com/metafacture/metafacture-core/actions?query=workflow%3ABuild)
+[![Build](https://github.com/metafacture/metafacture-core/actions/workflows/build.yml/badge.svg?branch=master)](https://github.com/metafacture/metafacture-core/actions?query=workflow%3ABuild)
 
 Metafacture is a toolkit for processing semi-structured data with a focus on library metadata. It provides a versatile set of tools for reading, writing and transforming data. Metafacture can be used as a stand-alone application or as a Java library in other applications. The name Metafacture is a portmanteau of the words *meta*data and manu*facture*.