function update_featured_image_title_foto( $post_id, $form_data ) {
    // Check form being used, else do nothing  
    if ( $form_data[ 'id' ] == 485 ) {
        // get post title
        $custom_image_title = esc_html( get_the_title($post_id) );
        // get featured image ID
        $featured_image_id = get_post_thumbnail_id($post_id);
 
        // update post_title 
        $updated_image_data = array(
           'ID' => $featured_image_id,
           'post_title' => $custom_image_title,
        );
       
      // Update the field(s)
      wp_update_post($updated_image_data);
 
    }
}
add_action( 'cred_save_data', 'update_featured_image_title_foto', 15, 2 );