Update pytest-cov requirement from <6 to <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@v1.0...v6.0.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pyproject.toml

@@ -109,7 +109,7 @@ release = [
 ]
 test = [
   "pytest<9",
-  "pytest-cov<6",
+  "pytest-cov<7",
   "pytest-regressions<3",
   "sphinx_pytest<0.3",
 ]