Update pytest-cov requirement from <4.2,>=2.7.1 to >=2.7.1,<5.1 (#6777)

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/v2.7.1...v5.0.0)

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

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pyproject.toml

@@ -67,7 +67,7 @@ dev = [
     "pdoc>=4.0.0",
     "pyinstaller==6.5.0",
     "pytest-asyncio>=0.23,<0.24",
-    "pytest-cov>=2.7.1,<4.2",
+    "pytest-cov>=2.7.1,<5.1",
     "pytest-timeout>=1.3.3,<2.4",
     "pytest-xdist>=2.1.0,<3.6",
     "pytest>=6.1.0,<9",