chore(deps-dev): Update pytest-cov requirement from >=3,<6 to >=3,<7

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...v6.0.0)

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

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

pyproject.toml

@@ -13,7 +13,7 @@ pydantic = ">=1.9.0,<3.0.0"
 
 [tool.poetry.group.dev.dependencies]
 pytest = ">=7.1.2,<9.0.0"
-pytest-cov = ">=3,<6"
+pytest-cov = ">=3,<7"
 tox = ">=3.26,<5.0"
 ruff = ">=0.5.0,<0.9.0"
 pyright = ">=1.1.350,<1.2"