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](https://github.com/actions/upload-artifact/compare/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-preview.yml

@@ -18,7 +18,7 @@ jobs:
           node-version: '16'
       - run: npm ci
       - run: npm run build-site
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           name: site
           path: build/site
@@ -26,7 +26,7 @@ jobs:
         run: |
           mkdir -p build/pr
           echo ${{github.event.number}} > build/pr/number
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           name: pr
           path: build/pr

.github/workflows/test.yml

@@ -130,7 +130,7 @@ jobs:
 
       - name: Store Rendering Test Artifacts
         if: ${{ always() }}
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v3
         with:
           name: rendering-tests
           path: test/rendering/cases/**/actual.png