`target` holds array, not single object

For rendering the annotations, TIDO currently expects an object as value for target instead of an array as specified in the TextAPI.

TIDO should conform to the TextAPI and switch to an array here. (This is also needed for implementing the biblical references in Ahiqar.)

TIDO Code: https://gitlab.gwdg.de/subugoe/emo/tido/-/blob/develop/src/utils/annotations.js?ref_type=heads#L290

TextAPI specs: https://subugoe.pages.gwdg.de/emo/text-api/page/annotation_specs/#annotation-item-object