Update pytest-cov requirement from <6,>=4 to >=4,<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@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

@@ -30,7 +30,7 @@ test =[
     "flake8>=6.1,<8.0",
     "pylint~=3.0",
     "pytest>=7.2,<9.0",
-    "pytest-cov>=4,<6",
+    "pytest-cov>=4,<7",
 ]
 
 [project.urls]