Delete the step "Deploy to Vercel" from the deployment workflow, because it doesn't work.

Author: wongyah

.github/workflows/jekyll.yml

@@ -63,7 +63,3 @@ jobs:
       - name: Deploy to GitHub Pages
         id: deployment
         uses: actions/deploy-pages@v4
-      - name: Deploy to Vercel
-        run: |
-          curl -X POST "${{ secrets.VERCEL_DEPLOY_HOOK_URL }}"
-