Test Github Actions dashboard badge from meercode.io (#1640)

* try test the GA Dashboard badge

* try this

* try this

Author: valeriupredoi

README.md

@@ -9,6 +9,7 @@
 [![Docker Build Status](https://img.shields.io/docker/cloud/build/esmvalgroup/esmvalcore)](https://hub.docker.com/r/esmvalgroup/esmvalcore/)
 [![Anaconda-Server Badge](https://anaconda.org/esmvalgroup/esmvalcore/badges/installer/conda.svg)](https://conda.anaconda.org/esmvalgroup)
 [![Github Actions Test](https://github.com/ESMValGroup/ESMValCore/actions/workflows/run-tests.yml/badge.svg)](https://github.com/ESMValGroup/ESMValCore/actions/workflows/run-tests.yml)
+[![Github Actions Dashboard](https://api.meercode.io/badge/ESMValGroup/ESMValCore?type=ci-success-rate&branch=main&lastDay=14)](https://meercode.io)
 
 ![esmvaltoollogo](https://github.com/ESMValGroup/ESMValCore/blob/main/doc/figures/ESMValTool-logo-2.png)