Change the guid to be a link instead of an ID

This should prevent duplicate emails being sent after running
`tome:import` as I think the entity IDs change - causing a different
guid and the automation to trigger again for the same email.

config/sync/views.view.daily_email_rss_feed.yml

@@ -532,8 +532,8 @@ display:
           creator_field: uid
           date_field: created
           guid_field_options:
-            guid_field: nid
-            guid_field_is_permalink: false
+            guid_field: view_node
+            guid_field_is_permalink: true
       display_extenders: {  }
       path: rss/daily.xml
     cache_metadata: