build(deps): bump pytest-cov in the test-dependencies group

Bumps the test-dependencies group with 1 update: [pytest-cov](https://github.com/pytest-dev/pytest-cov).


Updates `pytest-cov` from 5.0.0 to 6.0.0
- [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
  update-type: version-update:semver-major
  dependency-group: test-dependencies
...

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

Author: dependabot[bot]

pyproject.toml

@@ -30,7 +30,7 @@ dependencies = [
 ]
 
 [project.optional-dependencies]
-tests = ["pytest==8.3.3", "pytest-pyvista==0.1.9", "pytest-cov==5.0.0"]
+tests = ["pytest==8.3.3", "pytest-pyvista==0.1.9", "pytest-cov==6.0.0"]
 doc = [
     "ansys-sphinx-theme==1.1.7",
     "jupyter_sphinx==0.5.3",