Fix json doc test
@@ -92,9 +92,9 @@ pub mod nested {
/// # Examples
///
/// ```
-/// # #[cfg(features = "macros")] {
+/// # #[cfg(feature = "macros")] {
/// # use serde_derive::{Deserialize, Serialize};
-/// # use serde_derive::{serde_as, json::JsonString};
+/// # use serde_with::{serde_as, json::JsonString};
/// #
/// #[serde_as]
/// #[derive(Deserialize, Serialize)]
