Docs: Update the summary for the `comment_form_fields` hook docs to explicitly mention inclusion of the textarea element as a filterable element.

Previously [35723]

Props bappidgreat.
Fixes #34973.


git-svn-id: https://develop.svn.wordpress.org/trunk@35877 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/comment-template.php

@@ -2169,7 +2169,7 @@ function comment_form( $args = array(), $post_id = null ) {
 					$comment_fields = array( 'comment' => $args['comment_field'] ) + (array) $args['fields'];
 
 					/**
-					 * Filter the comment form fields.
+					 * Filter the comment form fields, including the textarea.
 					 *
 					 * @since 4.4.0
 					 *