`wp.mce.embedView.fetch()` and `wp.media.view.EmbedLink.fetch()` need to pass the same parameters.

Fixes #28532.


git-svn-id: https://develop.svn.wordpress.org/trunk@28816 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/js/media-views.js

@@ -6541,7 +6541,7 @@
 			wp.ajax.send( 'parse-embed', {
 				data : {
 					post_ID: media.view.settings.post.id,
-					content: '[embed]' + this.model.get('url') + '[/embed]'
+					shortcode: '[embed]' + this.model.get('url') + '[/embed]'
 				}
 			} ).done( _.bind( this.renderoEmbed, this ) );
 		},