update comments

event/proto/event.proto

@@ -10,7 +10,7 @@ service Event {
 	rpc Subscribe(SubscribeRequest) returns (stream SubscribeResponse) {}
 }
 
-// Publish a message to the event. Specify a topic to group messages for a specific topic.
+// Publish a message to the event stream.
 message PublishRequest {
 	// The topic to publish to
 	string topic = 1;