Fix badge links in README.md

Author: MLopez-Ibanez

README.md

@@ -6,5 +6,5 @@ moocore testsuite
 
 This is a testsuite for [`moocore`](https://github.com/multi-objective/moocore).
 
-[testsuite-badge]: https://github.com/multi-objective/testsuite/actions/workflows/moocore.yml/badge.svg?event=push
+[testsuite-badge]: https://github.com/multi-objective/testsuite/actions/workflows/moocore.yml/badge.svg
 [testsuite-link]: https://github.com/multi-objective/testsuite/actions/workflows/moocore.yml