Bump pytest-cov from 4.1.0 to 5.0.0 (DiamondLightSource#215)

Bumps [pytest-cov](https://github.com/pytest-dev/pytest-cov) from 4.1.0 to 5.0.0.
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v4.1.0...v5.0.0)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements_dev.txt

@@ -7,5 +7,5 @@ scanspec==0.6.6
 pydantic==1.10.14
 importlib_resources==6.1.1
 pytest==8.1.1
-pytest-cov==4.1.0
+pytest-cov==5.0.0
 pytest-random-order==1.1.1