chore: keep and update lw7 announcement banner

apps/www/components/LaunchWeek/Banners/CountdownBanner.tsx

@@ -37,7 +37,7 @@ function CountdownBanner() {
           <div>
             <Link href="/launch-week">
               <a className="bg-white text-xs px-1.5 md:px-2.5 py-1 rounded-full text-[#9E44EF] shadow-none hover:shadow-mg cursor-pointer">
-                Now live
+                Explore
               </a>
             </Link>
           </div>

apps/www/components/Nav/index.tsx

@@ -10,7 +10,8 @@ import SolutionsData from 'data/Solutions.json'
 
 import Solutions from '~/components/Nav/Product'
 import Developers from '~/components/Nav/Developers'
-// import Announcement from '~/components/Nav/Announcement'
+import Announcement from '~/components/Nav/Announcement'
+import CountdownBanner from '~/components/LaunchWeek/Banners/CountdownBanner'
 import ScrollProgress from '~/components/ScrollProgress'
 
 import { useIsLoggedIn, useTheme } from 'common'
@@ -196,9 +197,9 @@ const Nav = () => {
 
   return (
     <>
-      {/* <Announcement>
+      <Announcement>
         <CountdownBanner />
-      </Announcement> */}
+      </Announcement>
       <div className="sticky top-0 z-40 transform" style={{ transform: 'translate3d(0,0,999px)' }}>
         <div
           className={[