build(deps): update pytest requirement from <7.0.0 to <9.0.0

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@1.0.0b3...8.3.3)

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

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

requirements-devenv.txt

@@ -1,5 +1,5 @@
 -r requirements-linting.txt
 -r requirements-testing.txt
 mockupdb # required by `pymongo` tests that are enabled by `pymongo` from linter requirements
-pytest<7.0.0 # https://github.com/pytest-dev/pytest/issues/9621; see tox.ini
+pytest<9.0.0 # https://github.com/pytest-dev/pytest/issues/9621; see tox.ini
 pytest-asyncio