Update pytest requirement from <8,>7 to >7,<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@7.0.0.post1...8.3.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements-dev.txt

@@ -15,7 +15,7 @@ numpy
 pillow
 pre-commit
 pluggy >= 1.4.0
-pytest > 7, < 8 # Datadog's ddtrace does not support pytest 8 yet. See https://github.com/DataDog/dd-trace-py/issues/8220
+pytest > 7, < 9 # Datadog's ddtrace does not support pytest 8 yet. See https://github.com/DataDog/dd-trace-py/issues/8220
 pytest-asyncio >= 0.18.2, != 0.22.0, < 0.23.0 # Cannot override event loop in 0.23.0. See https://github.com/pytest-dev/pytest-asyncio/issues/706 for more details.
 pytest-cov
 pytest-benchmark