build(deps-dev): 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] <support@github.com>

Author: dependabot[bot]

pyproject.toml

@@ -18,7 +18,7 @@ fastapi = ["fastapi"]
 
 [tool.poetry.group.dev.dependencies]
 pytest = ">=7.1.2,<9.0.0"
-pytest-cov = ">=3,<5"
+pytest-cov = ">=3,<6"
 pytest-asyncio = ">=0.21.1,<0.24.0"
 tox = ">=3.26,<5.0"
 httpx = ">=0.24.1,<0.28.0"