Adapt Readme.md to new CI workflow

Change-Id: I14572318c0db3bffbe8a2d08ea02565ce2f25cca
diff --git a/Readme.md b/Readme.md
index 550a7c9..0fb1fe8 100644
--- a/Readme.md
+++ b/Readme.md
@@ -4,13 +4,11 @@
 [![CRAN downloads](http://cranlogs.r-pkg.org/badges/RKorAPClient?color=brightgreen)](http://www.r-pkg.org/pkg/RKorAPClient)
 [![Project Status: Active – The project has reached a stable, usable state and is being actively developed.](https://www.repostatus.org/badges/latest/active.svg)](https://www.repostatus.org/#active)
 [![Lifecycle:stable](https://img.shields.io/badge/lifecycle-stable-brightgreen.svg)](https://www.tidyverse.org/lifecycle/#stable)
+[![R build status](https://github.com/KorAP/RKorAPClient/workflows/R-CMD-check/badge.svg)](https://github.com/KorAP/RKorAPClient/actions)
 [![Codecov test coverage](https://codecov.io/gh/KorAP/RKorAPClient/branch/master/graph/badge.svg)](https://codecov.io/gh/KorAP/RKorAPClient?branch=master)
 [![Last commit](https://img.shields.io/github/last-commit/KorAP/RKorAPClient.svg)](https://github.com/KorAP/RKorAPClient/issues)
 [![GitHub closed issues](https://img.shields.io/github/issues-raw/KorAP/RKorAPClient.svg)](https://github.com/KorAP/RKorAPClient/issues)
 [![GitHub issues](https://img.shields.io/github/issues-closed-raw/KorAP/RKorAPClient.svg)](https://github.com/KorAP/RKorAPClient/issues)
-[![check-windows](https://github.com/KorAP/RKorAPClient/workflows/check-windows/badge.svg)](https://github.com/KorAP/RKorAPClient/actions?workflow=check-windows)
-[![check-mac](https://github.com/KorAP/RKorAPClient/workflows/check-mac/badge.svg)](https://github.com/KorAP/RKorAPClient/actions?workflow=check-mac)
-[![check-linux](https://github.com/KorAP/RKorAPClient/workflows/check-linux/badge.svg)](https://github.com/KorAP/RKorAPClient/actions?workflow=check-linux)
 [![Github Stars](https://img.shields.io/github/stars/KorAP/RKorAPClient.svg?style=social&label=Github)](https://github.com/KorAP/RKorAPClient)
 
 ## Description