build(deps): bump pytest from 8.1.1 to 9.0.3 in /tests

Bumps [pytest](https://github.com/pytest-dev/pytest) from 8.1.1 to 9.0.3.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.1.1...9.0.3)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 9.0.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

tests/requirements.txt

@@ -1,5 +1,5 @@
 black==26.3.1
-pytest==8.1.1
+pytest==9.0.3
 pytest-httpserver==1.0.10
 flaky==3.8.1
 msgpack==1.0.8