deps: update pytest-cov requirement from ^5.0.0 to ^6.0.0

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@v5.0.0...v6.0.0)

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

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

Author: dependabot[bot]

pyproject.toml

@@ -27,7 +27,7 @@ toml = "^0.10.0"
 black = "^24.3.0"
 pytest = "^8.3.1"
 httpx = { version = ">=0.24.0", optional = true }
-pytest-cov = "^5.0.0"
+pytest-cov = "^6.0.0"
 coverage = "^7.2.5"
 
 [tool.poetry.extras]