fix: timeline支持CHILD_PROCESS_NODE的loading状态

src/views/bpm/processInstance/detail/ProcessInstanceTimeline.vue

@@ -256,7 +256,8 @@ const getApprovalNodeIcon = (taskStatus: number, nodeType: NodeType) => {
   if (
     nodeType === NodeType.START_USER_NODE ||
     nodeType === NodeType.USER_TASK_NODE ||
-    nodeType === NodeType.END_EVENT_NODE
+    nodeType === NodeType.END_EVENT_NODE ||
+    nodeType === NodeType.CHILD_PROCESS_NODE
   ) {
     return statusIconMap[taskStatus]?.icon
   }