MC-15146: Unify DataStore get and update interface

- Add link to data store page

Author: davemacaulay

docs/page-builder.yml

@@ -135,6 +135,10 @@ pages:
   - label: Architecture
     url: /page-builder/reference/architecture.html
     versionless: true
+    
+  - label: Data Store
+    url: /page-builder/reference/data-store.html
+    versionless: true
 
   - label: Events
     url: /page-builder/reference/events.html