Move pages deployment to a separate job (as suggested by the actions

documentation)

.github/workflows/main.yml

@@ -3,10 +3,6 @@ on:
   schedule:
     - cron: "0 */6 * * *"
   workflow_dispatch:
-# Permissions required for deployment to GitHub pages
-permissions:
-  pages: write
-  id-token: write
 jobs:
   # We run the plugin website CI in a separate job that doesn't have
   # SSH key access for extra security because it handles untrusted markdown.
@@ -99,6 +95,15 @@ jobs:
         uses: actions/upload-pages-artifact@v3
         with:
           path: 'joplin-website/docs/'
+  Deploy:
+    runs-on: ubuntu-latest
+    needs: Main
+    permissions:
+      # Permissions needed for pages deployment. See
+      # https://github.com/actions/deploy-pages
+      pages: write
+      id-token: write
+    steps:
       - name: Deploy to GitHub Pages
         id: deployment
         uses: actions/deploy-pages@v4