events: Add a link to MSC3554
@@ -227,9 +227,11 @@ pub struct Text {
/// The text content.
pub body: String,
- /// The language of the text.
+ /// The language of the text ([MSC3554]).
///
/// This must be a valid language code according to [BCP 47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt).
+ ///
+ /// [MSC3554]: https://github.com/matrix-org/matrix-spec-proposals/pull/3554
#[cfg(feature = "unstable-msc3554")]
#[serde(skip_serializing_if = "Option::is_none")]
pub lang: Option<String>,
