build(deps): bump codecov/codecov-action from 3 to 4

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3 to 4.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v3...v4)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/coverage.yml

@@ -77,7 +77,7 @@ jobs:
           .github/actions/init_initialize-imap-fixtures.sh
           docker-compose exec -T app .github/actions/test_tests-imap.sh
       - name: "Codecov"
-        uses: "codecov/codecov-action@v3"
+        uses: "codecov/codecov-action@v4"
         with:
           files: ./tests/coverage-unit/clover.xml,./tests/coverage-functional/clover.xml,./tests/coverage-ldap/clover.xml,./tests/coverage-imap/clover.xml
           override_branch: ${{ matrix.branch }}