chore(deps): update actions/upload-artifact action to v6

Author: renovate[bot]

.github/workflows/playwright.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Run Playwright tests
         if: ${{ !contains(github.event.pull_request.labels.*.name, 'update snapshots') }}
         run: npm test:e2e
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         if: always()
         with:
           name: playwright-artifact