chore(deps): update pytest requirement from <9.0,>=8.0 to >=9.1.1,<10.0

Updates the requirements on [pytest](https://github.com/pytest-dev/pytest) to permit the latest version.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.0.0...9.1.1)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 9.1.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements-test.txt

@@ -1,4 +1,4 @@
-pytest>=8.0,<9.0
+pytest>=9.1.1,<10.0
 # PyYAML is required by the YAML-validating tests (test_release_doc_sync.py,
 # test_composite_action_shape.py). Without it those tests pytest.importorskip
 # and silently skip in CI, hiding real coverage.