Add React Conf banner (#7729)

src/components/Layout/Page.tsx

@@ -8,7 +8,7 @@ import {useRouter} from 'next/router';
 import {SidebarNav} from './SidebarNav';
 import {Footer} from './Footer';
 import {Toc} from './Toc';
-// import SocialBanner from '../SocialBanner';
+import SocialBanner from '../SocialBanner';
 import {DocsPageFooter} from 'components/DocsFooter';
 import {Seo} from 'components/Seo';
 import PageHeading from 'components/PageHeading';
@@ -137,7 +137,7 @@ export function Page({
           />
         </Head>
       )}
-      {/*<SocialBanner />*/}
+      <SocialBanner />
       <TopNav
         section={section}
         routeTree={routeTree}

src/components/SocialBanner.tsx

@@ -7,7 +7,7 @@ import {useRef, useEffect} from 'react';
 import cn from 'classnames';
 import {ExternalLink} from './ExternalLink';
 
-const bannerText = 'Stream React Conf on May 15-16.';
+const bannerText = 'Join us for React Conf on Oct 7-8.';
 const bannerLink = 'https://conf.react.dev/';
 const bannerLinkText = 'Learn more.';