chore(deps): 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@v4.0.0...v6.0.0)

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

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

pyproject.toml

@@ -47,7 +47,7 @@ test = [
     "python-jose[cryptography] >=3.3.0",
     "httpx >=0.23.0,<1.0.0",
     "pytest >=7.0.0,<9.0.0",
-    "pytest-cov >=4.0.0,<6.0.0",
+    "pytest-cov >=4.0.0,<7.0.0",
     "pytest-mock >=3.0.0,<4.0.0",
     "requests >=2.28.0,<3.0.0",
     "black ==24.8.0",