Bump actions/upload-artifact from 2 to 3

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 2 to 3.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v2...v3)

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

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

.github/workflows/build-documentation-preview.yml

@@ -26,14 +26,14 @@ jobs:
           extra-config: |
             plugin_script_base_path: "/${{ github.event.repository.name }}/pr-preview/pr-${{ github.event.number }}"
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         if: github.event.action != 'closed'
         with:
           name: jekyll-docs
           path: |
             build/**
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           name: source-event
           path: ${{ github.event_path }}