candle-datasets ssl

Hello all, I'm trying to use the functionality to download data sets of candle-datasets.

```
[package]
name = "pytorch-tutorial"
version = "0.1.0"
edition = "2024"

[dependencies]
candle-core = { version = "0.10.2", features = ["metal"] }
candle-datasets = "0.10.2"
candle-nn = { version = "0.10.2", features = ["metal"] }
hf-hub = "0.5.0"
openssl-sys = { version = "0.9.117", features = ["vendored"] }
serde = "1.0.228"
serde_json = "1.0.150"
tokenizers = "0.23.1"
```

```
use candle_core::{DType, Device, Result, Tensor};
use candle_datasets::vision::fashion_mnist;
use candle_nn::{Embedding, Module, VarBuilder};
use serde::Deserialize;

fn main() {
println!("Hello, world!");
let candle_datasets::vision::Dataset {
train_images,
train_labels,
test_images,
test_labels,
..
} = fashion_mnist::load().unwrap();

println!("{:?}", train_images.shape());

}
```

I get this back when I run the program:
```
Hello, world!

thread 'main' (13041993) panicked at src/main.rs:14:31:
called `Result::unwrap()` on an `Err` value: Api error: request error: https://huggingface.co/datasets/zalando-datasets/fashion_mnist/resolve/refs%2Fconvert%2Fparquet/fashion_mnist/test/0000.parquet: Connection Failed: tls connection init failed: invalid peer certificate: UnknownIssuer
```

Adding my enterprise ssl certs to the macOS Keychain and to the homebrew openssl installation seem to have no effect. Is there anyway to disable ssl for downlpoad?

Thank you

Reproduce the failure from src/main.rs by running the fashion_mnist::load() entry point with the dependency versions shown. Trace the TLS setup used for the Hugging Face dataset request and determine how enterprise certificates are expected to be handled. Done means the download works with the reported certificate environment, or the supported limitation and configuration are documented.

Written by the indexing model from the issue text.