Use string display instead of debug for url parse trace

[zanieb]

e.g.

uv_client::html::parse url=https://download.pytorch.org/whl/torch_stable.html

instead of

uv_client::html::parse url=Url { scheme: "https", cannot_be_a_base: false, username: "", password: None, host: Some(Domain("download.pytorch.org")), port: None, path: "/whl/torch_stable.html", query: None, fragment: None }