Adds an action hook specific to this page.

Fires on {@see ‘wp_head’}.

function do_activate_header() {
	/**
	 * Fires before the Site Activation page is loaded.
	 *
	 * Fires on the {@see 'wp_head'} action.
	 *
	 * @since 3.0.0
	 */
	do_action( 'activate_wp_head' );
}