Bump actions/upload-artifact from 5 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -30,7 +30,7 @@ jobs:
       - run: npm run test:unit:node
       - run: npm run test:webpack
       # Upload coverage for sonar (only matching OS and one node version required)
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         if: ${{ matrix.os == 'ubuntu-latest' && matrix.node-version == '24.x' }}
         with:
           name: code-coverage-${{matrix.os}}-${{matrix.node-version}}

.github/workflows/e2e-browser.yml

@@ -53,7 +53,7 @@ jobs:
           E2E_TEST_USER: ${{ secrets.E2E_TEST_USER }}
           E2E_TEST_PASSWORD: ${{ secrets.E2E_TEST_PASSWORD }}
       - name: Archive browser-based end-to-end test request logs
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: failure()
         continue-on-error: true
         with: