fix(ci): enable Pages auto-enrollment in configure-pages

First-run failed because the repository had no Pages site yet and
configure-pages@v5 defaults to enablement: false. Setting it to true
lets the action create the Pages site on first deploy and removes the
manual Settings -> Pages UI step.

.github/workflows/deploy.yml

@@ -39,6 +39,8 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - uses: actions/configure-pages@v5
+        with:
+          enablement: true
 
       - uses: actions/upload-pages-artifact@v3
         with: