build(deps): bump actions/upload-artifact from 5 to 6 (#2861)

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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -128,7 +128,7 @@ jobs:
       - run: npm run ci:unit:exunit
       - name: Upload coverage artifact
         if: ${{ always() }}
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: Elixir test coverage report
           path: cover/

.github/workflows/use-deploy-ecs.yml

@@ -126,7 +126,7 @@ jobs:
           CI: true
           HOME: /root
           HOST: ${{ needs.deploy.outputs.deployment-host }}
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         if: failure()
         with:
           name: smoke-test-report-${{ github.event.deployment_status.environment }}-${{ github.sha }}
@@ -155,7 +155,7 @@ jobs:
           CI: true
           HOME: /root
           HOST: ${{ needs.deploy.outputs.deployment-host }}
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         if: failure()
         with:
           name: critical-user-journey-report-${{ github.event.deployment_status.environment }}-${{ github.sha }}