Update deploy.yml file with new workflow configuration

Author: asif7774

.github/workflows/deploy.yml

@@ -1,15 +1,18 @@
 name: Deploy OpenGridX Demo
-
 on:
   push:
     branches:
       - main
+  workflow_dispatch:
 
 jobs:
   build-and-deploy:
     runs-on: ubuntu-latest
+
     permissions:
       contents: write
+      pages: write
+
     steps:
       - name: Checkout 🛎️
         uses: actions/checkout@v4