Correct the docs for the `post_type_labels_{$post_type}` filter.

Fixes #32707
Props dlh


git-svn-id: https://develop.svn.wordpress.org/trunk@32849 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/post.php

@@ -1676,7 +1676,7 @@ function get_post_type_labels( $post_type_object ) {
 	 *
 	 * @see get_post_type_labels() for the full list of labels.
 	 *
-	 * @param array $labels Array of labels for the given post type.
+	 * @param object $labels Object with labels for the post type as member variables.
 	 */
 	return apply_filters( "post_type_labels_{$post_type}", $labels );
 }