Upgrade upload-artifact

"This request has been automatically failed because it uses a deprecated version of `actions/upload-artifact: v3`. Learn more: https://github.blog/changelog/2024-04-16-deprecation-notice-v3-of-the-artifact-actions/"

Author: williamdes

.github/workflows/tests.yml

@@ -90,7 +90,7 @@ jobs:
             # For debugging issues
             - name: Archive test results
               if: failure()
-              uses: actions/upload-artifact@v3
+              uses: actions/upload-artifact@v4
               with:
                 name: test-run-output-${{ matrix.php-version }}-${{ matrix.os }}
                 retention-days: 1