Fix discord links (#288)

Author: reczkok

apps/typegpu-docs/src/pages/index.astro

@@ -26,7 +26,7 @@ import SwmLogoSvg from '../assets/swm-logo.svg';
 
         <div class="flex items-center gap-4">
           <a
-            href="https://https://discord.gg/8jpfgDqPcM"
+            href="https://discord.gg/8jpfgDqPcM"
             target="_blank"
             rel="noreferrer">
             <img
@@ -201,7 +201,7 @@ import SwmLogoSvg from '../assets/swm-logo.svg';
               <FooterLink
                 label="Share feedback with us"
                 callToAction="Join our Discord server"
-                href="https://https://discord.gg/8jpfgDqPcM"
+                href="https://discord.gg/8jpfgDqPcM"
               />
             </div>
           </div>