fix: fix errors and reformat code

src/pages/robots.txt.ts

@@ -1,16 +1,16 @@
-import type { APIRoute } from 'astro';
+import type { APIRoute } from 'astro'
 
 const robotsTxt = `
 User-agent: *
 Allow: /
 
 Sitemap: ${new URL('sitemap-index.xml', import.meta.env.SITE).href}
-`.trim();
+`.trim()
 
 export const GET: APIRoute = () => {
   return new Response(robotsTxt, {
     headers: {
       'Content-Type': 'text/plain; charset=utf-8',
     },
-  });
-};
+  })
+}