style(wise-cost-util): 添加注释

wise-cost-util/src/process.ts

@@ -54,7 +54,7 @@ export const getApprovalStatus = (processes: IProcess[]) => {
   return ApprovalStatus.PROCESSING;
 };
 
-// 获取当前的环节
+// 获取当前的环节（整个流程结束之后，当前环节为 null）
 export const getCurrentProcess = (processes: IProcess[]) => {
   if (isEmpty(processes)) {
     return null;