Fix mailchimp links

Author: KeiranWDigital

index.html

@@ -62,7 +62,7 @@ <h1>We are CodeWith</h1>
                 <h2>Subscribe to our mailing list</h2>
 
                 <!-- Begin Mailchimp Signup Form -->
-                <link href="//cdn-images.mailchimp.com/embedcode/classic-10_7.css" rel="stylesheet" type="text/css">
+                <link href="https://cdn-images.mailchimp.com/embedcode/classic-10_7.css" rel="stylesheet" type="text/css">
 
                 <div id="mc_embed_signup">
                     <form