Change path/url of admin-bar.min.css

admin-bar.min.css is not registered via the normal wp_register_style channels. It, and the other default styles, are registered by wp_default_styles, which registers them by directly manipulation the $styles object, though I don’t know what good that is since there are no hooks and you shouldn’t be hacking core files.

You should still be able to deregister that style and re-add it. If that doesn’t work I expect that you’d need to alter the $styles object yourself.