Update pytest-cov requirement from >=3,<5 to >=3,<6

Updates the requirements on [pytest-cov](https://github.com/pytest-dev/pytest-cov) to permit the latest version.
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v3.0.0...v5.0.0)

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

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

pyproject.toml

@@ -30,7 +30,7 @@ sphinx_rtd_theme = ">=1.0,<2.1"
 coverage = {extras = ["toml"], version = ">=5.1,<8.0"}
 ipdb = ">=0.13.9"
 pytest = "^7.1.2"
-pytest-cov = ">=3,<5"
+pytest-cov = ">=3,<6"
 pytest-mock = "^3.7.0"
 pyright = "^1.1.273"
 pytest-pyright = ">=0.0.3,<0.0.7"