docs: improve docs for IncomingReaction event

Follow-up to #6072.

Author: WofWca

deltachat-jsonrpc/src/api/types/events.rs

@@ -98,7 +98,10 @@ pub enum EventType {
         contact_id: u32,
     },
 
-    /// Incoming reaction, should be notified.
+    /// A reaction to one's own sent message received.
+    /// Typically, the UI will show a notification for that.
+    ///
+    /// In addition to this event, ReactionsChanged is emitted.
     #[serde(rename_all = "camelCase")]
     IncomingReaction {
         chat_id: u32,

src/events/payload.rs

@@ -95,7 +95,10 @@ pub enum EventType {
         contact_id: ContactId,
     },
 
-    /// Reactions for the message changed.
+    /// A reaction to one's own sent message received.
+    /// Typically, the UI will show a notification for that.
+    ///
+    /// In addition to this event, ReactionsChanged is emitted.
     IncomingReaction {
         /// ID of the chat which the message belongs to.
         chat_id: ChatId,