[Dependabot]: 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:production
...

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

tests/requirements.txt

@@ -1,7 +1,7 @@
 -r ../requirements.txt
 
 # Coverage collection
-Coverage ~= 7.5
+Coverage ~= 7.6
 
 # Test Runner
 pytest ~= 8.2