Issue #117: Update CI badge

Author: Jason Den Dulk

README.md

@@ -1,7 +1,4 @@
-<a href="https://github.com/catalyst/moodle-tool_advancedreplace/actions/workflows/ci.yml?query=branch%3AMOODLE_401_STABLE">
-<img src="https://github.com/catalyst/moodle-tool_advancedreplace/workflows/ci/badge.svg?branch=MOODLE_401_STABLE">
-</a>
-
+[![ci](https://github.com/catalyst/moodle-tool_advancedreplace/actions/workflows/ci.yml/badge.svg?branch=MOODLE_401_STABLE)](https://github.com/catalyst/moodle-tool_advancedreplace/actions/workflows/ci.yml?branch=MOODLE_401_STABLE)
 
 # moodle-tool_advancedreplace