docs: tweak commonjs example

readme.md

@@ -60,29 +60,26 @@ const api = new ChatGPTAPI({
 })
 ```
 
-Usage in CommonJS (Dynamic import):
+<details>
+<summary>Usage in CommonJS (Dynamic import)</summary>
 
 ```js
 async function example() {
-  // use ESM in CommonJS, dynamic import
+  // To use ESM in CommonJS, you can use a dynamic import
   const { ChatGPTAPI } = await import('chatgpt')
 
-  // sessionToken is required; see below for details
+  const api = new ChatGPTAPI({
-  const api = new ChatGPTAPI({ sessionToken: process.env.SESSION_TOKEN })
+    sessionToken: process.env.SESSION_TOKEN
-
+  })
-  // ensure the API is properly authenticated
   await api.ensureAuth()
 
-  // send a message and wait for the response
+  const response = await api.sendMessage('Hello World!')
-  const response = await api.sendMessage(
-    'Write a python version of bubble sort. Do not include example usage.'
-  )
-
-  // response is a markdown-formatted string
   console.log(response)
 }
 ```
 
+</details>
+
 A full [demo](./src/demo.ts) is included for testing purposes:
 
 ```bash