docs: make wording slightly clearer (#6740)

docs/content/2.guide/3.directory-structure/7.layouts.md

@@ -70,7 +70,7 @@ Alternatively, you can override the default layout per-page like this:
 
 ```vue{}[pages/index.vue]
 <script>
-// This will also work in `<script setup>`
+// This will work in both `<script setup>` and `<script>`
 definePageMeta({
   layout: "custom",
 });