Steps to reproduce the issue:

1. Open .github/workflows/ci.yml
2. Look at the tests-system job (line ~297)
3. This job runs in a matrix with 12 combinations (6 configs × 2 browsers: chrome, edge)
4. On line 362, the artifact upload step uses a static name: system-test-output
5. With actions/upload-artifact@v4, each matrix job tries to upload an artifact with the same name
6. This causes artifact upload failures for all but the first matrix run to complete

Expected Result
Each matrix combination should upload its test output artifact successfully with a unique name,
e.g., system-test-output-chrome-cmysqlmax, system-test-output-edge-cpostgres, etc.

Actual Result
Multiple matrix runs attempt to upload artifacts with the identical name system-test-output,
which fails under actions/upload-artifact@v4 (v4 no longer merges artifacts with the same name,
unlike v3). Only the first completed matrix run's artifact gets saved.

Additionally, the step name has a minor typo: "Archive test results results" (word "results" is duplicated).

System Information
Branch: 5.4-dev
File: .github/workflows/ci.yml, lines 358-364
GitHub Actions: actions/upload-artifact@v4

Additional
Suggested fix — make the artifact name unique per matrix combination:

      - name: Archive test results
        uses: actions/upload-artifact@v4
        if: always()
        with:
          name: system-test-output-${{ matrix.browser }}-${{ matrix.config.test_group }}
          path: tests/System/output
          if-no-files-found: ignore

Reference
https://github.com/actions/upload-artifact/blob/main/docs/MIGRATION.md#multiple-uploads-to-the-same-named-artifact