Hi all, Although in https://www.w3.org/TR/annotation-model/ `motivation` is always followed by a string in [Content State API](https://iiif.io/api/content-state/1.0/) it is always a list, except for the [Multiple targets section](https://iiif.io/api/content-state/1.0/#53-multiple-targets-for-a-comparison-view) where motivation value is a string e.g.: `"motivation": "contentState",` instead of `"motivation": ["contentState"],` Should they be uniformed?