Potential doc update

### Describe the bug

README shows GitHub `huggingface-internal` account.

```toml
huggingface-hub = { git = "https://github.com/huggingface-internal/huggingface-hub-rs.git", features = ["xet"] }
```
Not sure if you meant to replace with: `https://crates.io/crates/huggingface-hub`

### Reproduction

```rust
N/A
```

### Expected behavior

_No response_

### Which API are you using?

Async API

### Logs or error messages

```shell

```

### System info

```shell
N/A
```

### Additional context

_No response_