Specify how to annotate objects with id property.

Author: msporny

index.html

@@ -3216,8 +3216,8 @@ <h2>Integrity of Related Resources</h2>
 
         <p>
 Any object in the [=verifiable credential=] that contains an `id`
-property MAY be annotated with integrity information as specified in this
-section.
+property MAY be annotated with integrity information by adding the
+`digestSRI` or `digestMultibase` and `mediaType` properties.
         </p>
 
         <p>