Update README.md

Author: jgabry

README.md

@@ -3,7 +3,7 @@
 <!-- badges: start -->
 [![CRAN_Status_Badge](https://www.r-pkg.org/badges/version/bayesplot?color=blue)](https://cran.r-project.org/web/packages/bayesplot)
 [![Downloads](https://cranlogs.r-pkg.org/badges/bayesplot?color=blue)](https://cran.rstudio.com/package=bayesplot)
-[![R-CMD-check](https://github.com/stan-dev/bayesplot/workflows/R-CMD-check/badge.svg)](https://github.com/stan-dev/bayesplot/actions)
+[![R-CMD-check](https://github.com/stan-dev/bayesplot/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/stan-dev/bayesplot/actions/workflows/R-CMD-check.yaml)
 [![codecov](https://codecov.io/gh/stan-dev/bayesplot/branch/master/graph/badge.svg)](https://codecov.io/gh/stan-dev/bayesplot)
 <!-- badges: end -->