Bump pytest from 8.0.0 to 9.0.0

Bumps [pytest](https://github.com/pytest-dev/pytest) from 8.0.0 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](pytest-dev/pytest@8.0.0...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] <[email protected]>

Author: dependabot[bot]

pyproject.toml

@@ -35,7 +35,7 @@ dependencies = [
 dev = [
   "black",
   "homeassistant-stubs",
-  "pytest==8.0.0",
+  "pytest==9.0.0",
   "mypy",
   "ruff",
   "types-python-dateutil",