chore(deps-dev): update coverage requirement from ~=7.5 to ~=7.6

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@7.5.0...7.6.0)

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

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

requirements/dev.txt

@@ -4,7 +4,7 @@ pytest~=8.2.2
 pytest-asyncio~=0.23.3
 # pytest-order~=1.0.1
 mypy~=1.10.1
-coverage~=7.5
+coverage~=7.6
 pre-commit==3.5.0
 codespell==2.3.0
 bandit==1.7.9