Update coverage requirement from 7.4.2 to 7.4.3

Updates the requirements on [coverage](https://github.com/nedbat/coveragepy) to permit the latest version.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.4.2...7.4.3)

---
updated-dependencies:
- dependency-name: coverage
  dependency-type: direct:development
...

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

pyproject.toml

@@ -38,7 +38,7 @@ ruff = "0.2.2"
 pylint = "3.0.3"
 pytest = "8.0.1"
 pytest-cov = "4.1.0"
-coverage = "7.4.2"
+coverage = "7.4.3"
 mypy = "1.8.0"
 setuptools = ">65.5.1"
 sphinx = "7.2.6"