Update routing.mdx (#25881)

fix formatting

apps/docs/content/guides/functions/routing.mdx

@@ -93,12 +93,12 @@ import type { Context } from 'https://deno.land/x/hono/mod.ts';
 const app = new Hono();
 
 app.post('/hello-world', async (c: Context) => {
-const { name } = await c.req.json();
-return new Response(`Hello ${name}!`)
+  const { name } = await c.req.json();
+  return new Response(`Hello ${name}!`)
 });
 
 app.get('/hello-world', (c: Context) => {
-return new Response('Hello World!')
+  return new Response('Hello World!')
 });
 
 Deno.serve(app.fetch);