Update pytest requirement from <8,>=6.2.4 to >=6.2.4,<9

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](https://github.com/pytest-dev/pytest/compare/6.2.4...8.0.0)

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

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

requirements_test.txt

@@ -4,7 +4,7 @@ flake8==6.1.0
 isort==5.13.2
 mypy==1.8.0
 types-protobuf==4.24.0.20240129
-pytest>=6.2.4,<8
+pytest>=6.2.4,<9
 pytest-asyncio>=0.15.1,<=0.21.1
 mock>=4.0.3,<6
 pytest-cov>=4.1.0