Feedback for “How to upload data using web3.storage”

The page includes the following line in the code snippet:
```js
  const apiUrl = `/api/w3up-delegation/${client.agent().did()}`
```
But this code doesn't work because `client.agent` is not a function,
but the following code works fine:
```js
  const apiUrl = `/api/w3up-delegation/${client.agent.did()}`
```
I use the latest `w3up-client@12.4.1` btw