Update README.md

Author: albertoventurini

README.md

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 # Graph Database plugin for IntelliJ Platform
 
-![Build](https://github.com/albertoventurini/graphdb-intellij-plugin/actions/workflows/build-plugin.yaml/badge.svg)
+![Build and test](https://github.com/albertoventurini/graphdb-intellij-plugin/actions/workflows/build-plugin.yaml/badge.svg)
 
 This plugin adds support for graph databases to the IntelliJ IDEA platform.
 At the moment, the only supported database is Neo4j.