fix(sitemap): remove prerender to use dynamic hostname

The sitemap must use the actual request hostname so audit tools
test the correct deployment instead of following production URLs.

Author: HugoRCD

nuxt.config.ts

@@ -119,7 +119,6 @@ export default defineNuxtConfig({
     // Pre-render
     '/': { prerender: true },
     '/blog/rss.xml': { prerender: true },
-    '/sitemap.xml': { prerender: true },
     '/sitemap.md': { prerender: true },
     '/404.html': { prerender: true },
     '/docs/3.x/getting-started/introduction': { prerender: true },