refactor(code review): added salt to md5

src/Reminder.php

@@ -33,7 +33,7 @@ class Reminder {
 	public function display_html_element() {
 		if ( ! $this->is_plugin_activated() ) {
 			$logo_url          = plugins_url( 'plugin-dir' . '/' . $this->logo_url );
-			$cookie_name       = md5( site_url() );
+			$cookie_name       = md5( site_url() . 'plugin-dir' );
 			$subscriptions_url = admin_url( 'admin.php?page=wpdesk-licenses' );
 			$read_more_url     = 'https://flexibleshipping.com';
 			echo "<span class=\"wpdesk-activation-reminder\" data-plugin_title=\"plugin-title\" data-plugin_dir=\"plugin-dir\" data-logo_url=\"$logo_url\" data-cookie_name=\"$cookie_name\" data-subscriptions_url=\"$subscriptions_url\" data-buy_plugin_url=\"buy-plugin-url\" data-read_more_url=\"$read_more_url\"></span>";