btrfs-progs: ci: update CI badges

Add badges for the CI workflows.

Signed-off-by: David Sterba <[email protected]>

Author: kdave

README.md

@@ -1,7 +1,11 @@
-[![devel](https://github.com/kdave/btrfs-progs/actions/workflows/devel.yml/badge.svg)](https://github.com/kdave/btrfs-progs/actions/workflows/devel.yml)
 Btrfs-progs
 ===========
 
+![devel](https://github.com/kdave/btrfs-progs/actions/workflows/devel.yml/badge.svg)
+![coverage](https://github.com/kdave/btrfs-progs/actions/workflows/coverage.yml/badge.svg)
+![static](https://github.com/kdave/btrfs-progs/actions/workflows/artifacts-static-build.yml/badge.svg)
+![release](https://github.com/kdave/btrfs-progs/actions/workflows/ci-build-test.yml/badge.svg)
+
 Userspace utilities to manage btrfs filesystems.
 License: GPLv2.