chore(deps): update pytest requirement from ==8.4.* to ==9.1.*

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@8.4.0.dev0...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-testing.txt

@@ -1,5 +1,5 @@
 coverage[toml] == 7.*
-pytest == 8.4.*
+pytest == 9.1.*
 pytest-cov == 7.1.*
 pytest-timeout == 2.4.*
 pytest-xdist == 3.8.*