chore: added script to initialise gtm script

Author: adrienne-deriv

index.html

@@ -10,6 +10,9 @@
         <meta name="keywords" content="p2p, buy, sell" />
         <meta name="viewport" content="width=device-width, initial-scale=1.0" />
         <title>Buy and sell on Deriv P2P to fund your trading account | Deriv</title>
+        <!-- Start Cookies script -->
+        <script src="https://static.deriv.com/scripts/cookie.js" async></script>
+        <!-- End Cookies script -->
         <!-- Google Tag Manager -->
         <script>
             (function (w, d, s, l, i) {