Replace badges in README

README.md

@@ -1,6 +1,5 @@
 [![Documentation](https://readthedocs.org/projects/restic/badge/?version=latest)](https://restic.readthedocs.io/en/latest/?badge=latest)
-[![Build Status Travis](https://travis-ci.com/restic/restic.svg?branch=master)](https://travis-ci.com/restic/restic)
+[![Build Status](https://github.com/restic/restic/workflows/test/badge.svg)](https://github.com/restic/restic/actions?query=workflow%3Atest)
-[![Build Status AppVeyor](https://ci.appveyor.com/api/projects/status/nuy4lfbgfbytw92q/branch/master?svg=true)](https://ci.appveyor.com/project/fd0/restic/branch/master)
 [![Go Report Card](https://goreportcard.com/badge/github.com/restic/restic)](https://goreportcard.com/report/github.com/restic/restic)
 
 # Introduction