Update Azure deployment workflow to use variable for subscription ID

Author: alnuaimicoder

.github/workflows/azure-deploy.yml

@@ -28,7 +28,7 @@ jobs:
         with:
           client-id: ${{ secrets.AZURE_CLIENT_ID }}
           tenant-id: ${{ secrets.AZURE_TENANT_ID }}
-          subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
+          subscription-id: ${{ vars.AZURE_SUBSCRIPTION_ID }}
 
       - uses: Azure/CLI@v2
         with: