Are you looking for a way to disable WordPress version updates? While there’s probably a plugin for this, we have created a quick code snippet that you can use to disable WordPress update function.
All you have to do is add this code to your theme’s functions.php file or in a site-specific plugin:
add_filter( 'pre_site_transient_update_core', create_function( '$a', "return null;" ) );
Note: If this is your first time adding code snippets in WordPress, then please refer to our guide on how to properly add code snippets in WordPress, so you don’t accidentally break your site.