Editor: Check the correct post type support property for `initial_edits`.

The property to check should be `editor` instead of `content`, as posts don't have a `content` support property.

This addresses an e2e test failure in Gutenberg.

Follow-up to [52230].

Props talldanwp.
See #53813.
Built from https://develop.svn.wordpress.org/trunk@52231


git-svn-id: http://core.svn.wordpress.org/trunk@51823 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/edit-form-blocks.php

@@ -86,7 +86,7 @@ if ( 'auto-draft' === $post->post_status ) {
 		$initial_edits['title'] = $post->post_title;
 	}
 
-	if ( post_type_supports( $post->post_type, 'content' ) ) {
+	if ( post_type_supports( $post->post_type, 'editor' ) ) {
 		$initial_edits['content'] = $post->post_content;
 	}
 

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-52230';
+$wp_version = '5.9-alpha-52231';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.