Format a yml file

.github/workflows/unit-test-min.yml

@@ -3,7 +3,7 @@ name: Run unit tests with oldest dependency versions
 # dependencies listed in `pyproject.toml`. The oldest versions are specified in
 # `ci/minimum/requirements.txt`. The `requirements.txt` file is needs to
 # be manually updated to be aligned with `pyproject.toml`.
-# 
+#
 # In the future, `pip` might be able to install the minimum versions in
 # `pyproject.toml` directly as disscussed in an open issue:
 # https://github.com/pypa/pip/issues/8085