Link in /auth instructions is broken

### What happened?

I run `/auth` and authenticate successfully with my google account however CLI throws this error
```
│ This account requires setting the GOOGLE_CLOUD_PROJECT or GOOGLE_CLOUD_PROJECT_ID env var. See │
│ https://goo.gle/gemini-cli-auth-docs#workspace-gca
```

But `https://goo.gle/gemini-cli-auth-docs#workspace-gca` redirects to a 404 https://github.com/google-gemini/gemini-cli/blob/main/docs/cli/authentication.md#workspace-gca

### What did you expect to happen?

The link resolves

### Client information

Client Information

Run `gemini` to enter the interactive CLI, then run the `/about` command.

```console
> /about
# paste output here
```

### Login information

_No response_

### Anything else we need to know?

_No response_