Update pytest requirement from <8.0,>=6.2.5 to >=6.2.5,<9.0 (#724)

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@6.2.5...8.0.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements/test.txt

@@ -1,4 +1,4 @@
 pytest-django>=4.5.2,<5.0
-pytest>=6.2.5,<8.0
+pytest>=6.2.5,<9.0
 pytest-timeout
 ephem