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/ci.yaml

@@ -53,7 +53,7 @@ jobs:
           echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
       - run: composer update --${{ matrix.stability }} --prefer-dist --no-interaction # yamllint disable-line
       - run: vendor/bin/phpunit
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
 
   yamllint:
     runs-on: ubuntu-latest