Bump pytest from 8.1.1 to 9.0.0 in /python

Bumps [pytest](https://github.com/pytest-dev/pytest) from 8.1.1 to 9.0.0.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/8.1.1...9.0.0)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 9.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

python/web/requirements-dev.txt

@@ -14,7 +14,7 @@ platformdirs==4.2.0
 pluggy==1.6.0
 pycodestyle==2.14.0
 pyflakes==3.4.0
-pytest==8.1.1
+pytest==9.0.0
 pytest_httpserver==1.1.3
 requests==2.32.4
 urllib3==2.5.0