Fix sitemap (#9916)

Author: gilgardosh

website/next-sitemap.config.cjs

@@ -3,4 +3,5 @@ module.exports = {
   siteUrl: process.env.SITE_URL || 'https://the-guild.dev/graphql/codegen',
   generateIndexSitemap: false,
   exclude: ['*/_meta'],
+  output: 'export',
 };