fix: 修复取值错误

data/data-models/modules/article/transform/content.js

@@ -135,7 +135,7 @@ class CommonContentModel extends BaseModel {
       const signEndTime = abstract?.default?.signEndTime
       if (signEndTime) {
         const now = Date.now()
-        const signupEnd = item.signEndTime * 1000 < now
+        const signupEnd = signEndTime * 1000 < now
         if (signupEnd) {
           const jiezhi = {
             label: '报名已截止',