Update README.md

Author: staabm

README.md

@@ -16,6 +16,9 @@ You may append additional parameters to the command, e.g. `vendor/bin/phpunit --
 
 ## Example GitHub Actions workflow
 
+The workflow shows a typical usage example within a GitHub Actions workflow.
+You may adjust this workflow as you see fit e.g. to use a different Test Runner.
+
 ```yaml
 # https://help.github.com/en/categories/automating-your-workflow-with-github-actions
 
@@ -81,4 +84,4 @@ jobs:
       - name: "Tests"
         run: "vendor/bin/phpunit --testsuite ${{ matrix.suite-name }}"
 
-```
+```