I recommend creating a devlog when you push out the update: https://itch.io/updates/devlogs-post-types-enhanced-browsing-and-more (see the A New System For Updated Games section).
A devlog "major update" post can boost how your page is ranked on our browse pages in terms of popularity. At the moment devlog posts are reviewed since we don't want people trying to abuse the system with low quality posts, so if you're posting an update post please put some effort into it. (Include text of changes, some images, any other information)