Update pytest-cov requirement from <7,>=6.0.0 to >=6.0.0,<8

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](https://github.com/pytest-dev/pytest-cov/compare/v6.0.0...v7.0.0)

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

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

pyproject.toml

@@ -25,7 +25,7 @@ dev = [
     "ipython>=9.0.2,<10",
     "pytest>=8.0.2,<9",
     "pytest-asyncio>=1.0.0,<2",
-    "pytest-cov>=6.0.0,<7",
+    "pytest-cov>=6.0.0,<8",
     "pytest-datafiles>=3.0.0,<4",
     "pytest-xdist>=3.4.0,<4",
     "rich>=14.0.0,<15",