Update pytest-cov requirement in the packages group (#325)

Updates the requirements on [pytest-cov](https://github.com/pytest-dev/pytest-cov) to permit the latest version.

Updates `pytest-cov` to 7.0.0
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v6.1.0...v7.0.0)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-version: 7.0.0
  dependency-type: direct:production
  dependency-group: packages
...

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Author: dependabot[bot]

pyproject.toml

@@ -53,7 +53,7 @@ examples = [
 pre-commit = ["pre-commit ~=4.2"]
 testing = [
     "pytest ~=8.3",
-    "pytest-cov ~=6.1",
+    "pytest-cov >=6.1,<8.0",
     "pyyaml ~=6.0",
     "requests-mock ~=1.12",
 ]