Update pytest requirement from <8,>=6.1.0 to >=6.1.0,<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](pytest-dev/pytest@6.1.0...8.1.1)

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

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

requirements-test.txt

@@ -2,6 +2,6 @@ datadiff>=2.0,<3
 fastapi[test]
 marko<3
 poethepoet<0.26
-pytest>=6.1.0,<8
+pytest>=6.1.0,<9
 pytest-cov<6
 ruff<0.4;python_version>='3.7'