doc: update the coveralls badge to use shields.io

This is a workaround for the coveralls stale cache problem.

Signed-off-by: Paul Moore <paul@paul-moore.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/README.md b/README.md
index 0bd1895..3366b7f 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ https://github.com/seccomp/libseccomp
 
 [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/608/badge)](https://bestpractices.coreinfrastructure.org/projects/608)
 [![Build Status](https://travis-ci.org/seccomp/libseccomp.svg?branch=master)](https://travis-ci.org/seccomp/libseccomp)
-[![Coverage Status](https://coveralls.io/repos/github/seccomp/libseccomp/badge.svg?branch=master)](https://coveralls.io/github/seccomp/libseccomp?branch=master)
+[![Coverage Status](https://img.shields.io/coveralls/github/seccomp/libseccomp/master.svg)](https://coveralls.io/github/seccomp/libseccomp?branch=master)
 
 The libseccomp library provides an easy to use, platform independent, interface
 to the Linux Kernel's syscall filtering mechanism.  The libseccomp API is