Changelog: Add delayed event to the widget driver.

Also mention the breaking change in the public widget capabilities interface.

crates/matrix-sdk/CHANGELOG.md

@@ -19,6 +19,7 @@ Breaking changes:
   generated by the SDK.
 - The `Error::InconsistentState` error variant has been removed because it was never used or
   generated by the SDK.
+- The widget capabilities in the FFI now need two additional flags: `update_delayed_event`, `send_delayed_event`.
 
 Additions:
 
@@ -36,8 +37,8 @@ Additions:
 - Add `send_call_notification` and `send_call_notification_if_needed` methods. This allows to implement sending ring events on call start.
 - The `get_media_content`, `get_media_file` and `get_file` methods of the
   `Media` api now support the new authenticated media endpoints.
-- WidgetDriver: Support the `"future_timeout"` and `"future_group_id"` fields in the `send_event` widget actions.
-This allows to send future events, as defined in [MSC4157](https://github.com/matrix-org/matrix-spec-proposals/pull/4157)
+- WidgetDriver: Support the `"delay"` field in the `send_event` widget actions.
+This allows to send delayed events, as defined in [MSC4157](https://github.com/matrix-org/matrix-spec-proposals/pull/4157)
 
 # 0.7.0