github-actions(deps): bump actions/upload-pages-artifact from 2 to 3 (#57)

Author: dependabot[bot]

.github/workflows/publish-docs.yaml

@@ -32,7 +32,7 @@ jobs:
       - run: mkdocs build --strict
       - name: Setup Pages
         uses: actions/configure-pages@v3
-      - uses: actions/upload-pages-artifact@v2
+      - uses: actions/upload-pages-artifact@v3
         with:
           path: site/
       - name: Deploy to GitHub Pages