package update in dev(deps-dev): update pytest-cov requirement

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@v4.1.0...v6.0.0)

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

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

pyproject.toml

@@ -71,7 +71,7 @@ mkdocs-git-revision-date-localized-plugin = "^1.2.0"
 pillow = ">=10,<12"
 cairosvg = "^2.7.0"
 lxml = ">=4.9.3,<6.0.0"
-pytest-cov = ">=4.1,<6.0"
+pytest-cov = ">=4.1,<7.0"
 pytest-django = "^4.5.2"
 pytest-mock = "^3.11.1"
 dj-database-url = "^2.0.0"