Update codecov/codecov-action action to v4 (#328)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -70,7 +70,7 @@ jobs:
         run: vendor/bin/phpunit --coverage-text --coverage-xml build/coverage-xml --coverage-cobertura build/cobertura.xml
 
       - name: Upload coverage reports to Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}