Updating banner mock to correct stubbing in tests

Author: A-Wheeto

app/services/cms/providers/strapi/mocks/collections/site_wide_banner.rb

@@ -4,7 +4,7 @@ module Strapi
       module Mocks
         module Collections
           class SiteWideBanner < StrapiMock
-            attribute(:textContent) { Text::RichBlocks.as_model }
+            attribute(:textContent) { Text::RichBlocks.generate_data }
             attribute(:startTime) { Faker::Time.backward(days: 2) }
             attribute(:endTime) { Faker::Time.forward(days: 2) }
           end