chore: examples with the right argument order (#3493)

Author: andrefmonteiro

docs/content/docs/2.collections/1.define.md

@@ -37,10 +37,10 @@ import { defineCollection, defineContentConfig } from '@nuxt/content'
 export default defineContentConfig({
   collections: {
     docs: defineCollection({
-      // Load every file inside the `content` directory
-      source: '**',
       // Specify the type of content in this collection
       type: 'page'
+      // Load every file inside the `content` directory
+      source: '**',
     })
   }
 })
@@ -64,8 +64,8 @@ import { defineCollection, defineContentConfig, z } from '@nuxt/content'
 export default defineContentConfig({
   collections: {
     blog: defineCollection({
-      source: 'blog/*.md',
       type: 'page',
+      source: 'blog/*.md',
       // Define custom schema for docs collection
       schema: z.object({
         tags: z.array(z.string()),