update docs

docs/content/1.get-started/3.tips/5.headers.md

@@ -16,9 +16,8 @@ export default defineNuxtPlugin(() => {
         // headers need to be a function so it gets called dynamically
         // every HTTP request
         headers() {
-          return {
-            ...headers
-          }
+          // You can add more custom headers here
+          return headers
         }
       }),
     ],