fix(object_association_merger_node): fix the frame id of output objec…

…t msg (autowarefoundation#8674)

fix: fix the object msg header

Signed-off-by: vividf <yihsiang.fang@tier4.jp>

perception/autoware_object_merger/src/object_association_merger_node.cpp

@@ -152,6 +152,7 @@ void ObjectAssociationMergerNode::objectsCallback(
   // build output msg
   autoware_perception_msgs::msg::DetectedObjects output_msg;
   output_msg.header = input_objects0_msg->header;
+  output_msg.header.frame_id = base_link_frame_id_;
 
   /* global nearest neighbor */
   std::unordered_map<int, int> direct_assignment, reverse_assignment;