[fix] "superagent: double callback bug" with maxResponseSize

## Describe the bug

**Node.js version:** v22.14.0

**OS version:** Windows 11

**Description:**
When I use `maxResponseSize` and the response is larger than the size I've set, I receive `superagent: double callback bug`.

This is the case for any image URLs I tried, and also some other links like https://google.com. However there's also some links that does not cause this, for example: https://example.com

## Actual behavior

```
superagent: double callback bug
superagent: double callback bug
Error: Maximum response size reached
at IncomingMessage. (D:\test\node_modules\superagent\lib\node\index.js:1034:25)
at IncomingMessage.emit (node:events:529:35)
at Readable.read (node:internal/streams/readable:582:10)
at flow (node:internal/streams/readable:1064:34)
at resume_ (node:internal/streams/readable:1045:3)
at process.processTicksAndRejections (node:internal/process/task_queues:82:21) {
code: 'ETOOLARGE',
response: null
}
```

## Expected behavior

I should only receive the maximumr esponse size reached error

## Code to reproduce

```js
const superagent = require('superagent');

superagent
.get('https://upload.wikimedia.org/wikipedia/en/a/a9/Example.jpg')
.maxResponseSize(1)
.then((res) => console.log(res.body))
.catch((err) => console.error(err));
```

## Checklist

- [x] I have searched through GitHub issues for similar issues. (There is https://github.com/ladjs/superagent/issues/1801 but that's for timeouts, though these _may_ be related)
- [x] I have completely read through the README and documentation.
- [x] I have tested my code with the latest version of Node.js and this package and confirmed it is still not working.