Update pytest-cov requirement from <5.1,>=5 to >=5,<6.1 (#469)

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]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pyproject.toml

@@ -55,7 +55,7 @@ tests = [
     "pytest>=8,<8.4",  # Our testing framework
     "pytest-asyncio>=0.20,<0.25",  # Test async functions
     "pytest-console-scripts>=1.1,<1.5",  # Allow automatic testing of scripts
-    "pytest-cov>=5,<5.1",  # Pytest plugin for working with coverage
+    "pytest-cov>=5,<6.1",  # Pytest plugin for working with coverage
     "pytest-mock>=3.0,<3.15",  # Pytest plugin for mocking function calls and objects
     "ruff>=0.6,<0.8",
 ]