Refactor Discord links in codebase to use the updated invite link

src/app/privacy-policy/page.tsx

@@ -83,7 +83,7 @@ You can also optionally enable telemetry data collection and other Mozilla Resea
 # 9. Contact Us
 If you have any questions or concerns about this Privacy Policy or Zen Browser, please contact us at:
 
-* Discord: [Zen Browser's Discord](https://discord.com/servers/mauro-s-little-sweatshop-1088172780480114748)
+* Discord: [Zen Browser's Discord](https://discord.gg/zen-browser)
 * GitHub: [Organization](https://github.com/zen-browser)
 
 ---

src/components/footer.tsx

@@ -19,7 +19,7 @@ export default function Footer() {
               <a href="https://github.com/zen-browser">
                 <GitHubLogoIcon className="w-5 h-5" />
               </a>
-              <a href="https://discord.com/servers/mauro-s-little-sweatshop-1088172780480114748" className="ml-5">
+              <a href="https://discord.gg/zen-browser" className="ml-5">
                 <DiscordLogoIcon className="w-5 h-5" />
               </a>
               <a href="https://fosstodon.org/@zenbrowser" className="ml-5">

src/components/navigation.tsx

@@ -26,7 +26,7 @@ export const components: { title: string; href: string; description: string }[]
   },
   {
     title: "Discord",
-    href: "https://discord.com/servers/mauro-s-little-sweatshop-1088172780480114748",
+    href: "https://discord.gg/zen-browser",
     description: "Join our Discord server to chat with the community and get support."
   },
   {