fix CI badge and remove the coverage one

README.rst

@@ -6,11 +6,9 @@
 
 Nice and simple application to manage users and groups in multiple directory services.
 
-.. image:: https://travis-ci.org/kakwa/ldapcherry.svg?branch=master
-    :target: https://travis-ci.org/kakwa/ldapcherry
-
-.. image:: https://coveralls.io/repos/kakwa/ldapcherry/badge.svg 
-    :target: https://coveralls.io/r/kakwa/ldapcherry
+.. image:: https://github.com/kakwa/ldapcherry/actions/workflows/tests.yml/badge.svg
+    :target: https://github.com/kakwa/ldapcherry/actions/workflows/tests.yml
+    :alt: CI
 
 .. image:: https://img.shields.io/pypi/v/ldapcherry.svg
     :target: https://pypi.python.org/pypi/ldapcherry