Update pytest requirement from <8,>=7.1 to >=7.1,<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@7.1.0...8.0.0)

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

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

pyproject.toml

@@ -39,7 +39,7 @@ dependencies = [
 
 [project.optional-dependencies]
 tests = [
-    "pytest>=7.1,<8",
+    "pytest>=7.1,<9",
     "pytest-cov",
     "pytest-mock",
     "coverage",