chore: simplify deploy workflow and bump checkout to v6

Remove workflow_dispatch trigger and configure-pages step.
Rename workflow to 'Deploy'.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: vinta

.github/workflows/deploy.yml

@@ -1,9 +1,8 @@
-name: Deploy to GitHub Pages
+name: Deploy
 
 on:
   push:
     branches: ["main"]
-  workflow_dispatch:
 
 permissions:
   contents: read
@@ -22,10 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Setup Pages
-        uses: actions/configure-pages@v5
+        uses: actions/checkout@v6
 
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v4