chore(deps-dev): bump pytest from 8.4.2 to 9.0.1

Bumps [pytest](https://github.com/pytest-dev/pytest) from 8.4.2 to 9.0.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.4.2...9.0.1)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 9.0.1
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pyproject.toml

@@ -96,7 +96,7 @@ dev-pylint = [
   "frequenz-client-electricity-trading[dev-mkdocs,dev-noxfile,dev-pytest]",
 ]
 dev-pytest = [
-  "pytest == 8.4.2",
+  "pytest == 9.0.1",
   "frequenz-repo-config[extra-lint-examples] == 0.13.6",
   "pytest-mock == 3.15.1",
   "pytest-asyncio == 1.2.0",