Add link to info on setting polymorphic serializers #1906
Merged
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Purpose
Add a reference to show how to set sterilizers on polymorphic relationships.
Changes
Add a single sentence with a link that points to a header further down the page.
Additional helpful information
While this same document provides details on how to override the serializer_for, not all users will realize this could be used to set the sterilizers for polymorphic relationships. This change just adds a link to that documentation and makes that point obvious.