build: 更新 upload-pages-artifact动作到 v3 版本

- 将 GitHub Actions 中的 upload-pages-artifact 动作从 v2 升级到 v3
- 此更新可能带来性能提升和新功能，确保构建过程的最新优化

Author: runphp

.github/workflows/jekyll.yml

@@ -55,7 +55,7 @@ jobs:
         run: JEKYLL_GITHUB_TOKEN=${{ secrets.JEKYLL_GITHUB_TOKEN }} && bundle exec jekyll build --verbose --trace
       - name: Upload artifact
         # Automatically uploads an artifact from the './_site' directory by default
-        uses: actions/upload-pages-artifact@v2
+        uses: actions/upload-pages-artifact@v3
 
   # Deployment job
   deploy: