chore(readme): fix the tests GitHub actions badge.

README.md

@@ -5,7 +5,7 @@ SPDX-License-Identifier: BSD-3-Clause
 -->
 
 [![latest-docs](https://img.shields.io/badge/docs-latest-orange.svg)](https://auto-intersphinx.readthedocs.io/en/latest/)
-[![tests](https://github.com/idiap/auto-intersphinx/main/actions/workflows/tests.svg)](https://github.com/idiap/auto-intersphinx/actions)
+[![tests](https://github.com/idiap/auto-intersphinx/actions/workflows/tests.yml/badge.svg)](https://github.com/idiap/auto-intersphinx/actions)
 [![coverage](https://raw.githubusercontent.com/idiap/auto-intersphinx/python-coverage-comment-action-data/badge.svg)](https://htmlpreview.github.io/?https://github.com/idiap/auto-intersphinx/python-coverage-comment-action-data/htmlcov/index.html)
 [![repository](https://img.shields.io/badge/github-project-darkblue.svg)](https://github.com/idiap/auto-intersphinx)