url: use Display rather than Error's description in deserialize
url: use Display rather than Error's description in deserialize

Error's description method has been deprecated since 1.42.0. When
deserializing URLs, errors show a Rust-specific programming error
message rather than information about what failed, ie:

"invalid value: string "a string", expected description() is deprecated;
use Display"

This patch uses Display on the returned error.

Signed-off-by: Alejandro Martinez Ruiz <f955d6d2f0ee4d4bf5800710865ea25fff635d32@redhat.com>

servo/rust-url,servo/rust-url