Website: Update redirects (#2264)

Author: TuvalSimha

website/next.config.mjs

@@ -20,6 +20,7 @@ export default withGuildDocs({
       '/docs/introduction/context': '/docs/essentials/context',
       '/docs/advanced': '/docs/advanced/subscriptions',
       '/docs/next/recipes/migration': '/docs/recipes/migration',
+      '/docs/legacy/introduction/context': '/docs/get-started',
     }).map(([from, to]) => ({
       source: from,
       destination: to,