Update pytest requirement from ^7.1.2 to >=7.1.2,<9.0.0

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@7.1.2...8.3.4)

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

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

pyproject.toml

@@ -29,7 +29,7 @@ sphinx_rtd_theme = ">=1.0,<3.1"
 [tool.poetry.group.dev.dependencies]
 coverage = {extras = ["toml"], version = ">=5.1,<8.0"}
 ipdb = ">=0.13.9"
-pytest = "^7.1.2"
+pytest = ">=7.1.2,<9.0.0"
 pytest-cov = ">=3,<6"
 pytest-mock = "^3.7.0"
 pyright = "^1.1.273"