Add text above publish button in publish metabox

add-text-above-publish.php

add_action( 'post_submitbox_misc_actions', 'add_help_text_to_publish' );

function add_help_text_to_publish( $post_obj ) {
		global $post;
    //whatever custom post type 
		if ( 'custom-post-type' === $post->post_type ) {
			echo '<p style="padding-left: 15px;"><strong>Note:</strong> Some helpful text here.</p>';
		}
}