chore: Translate transifex_input.json in zh_CN

55% of minimum 50% translated source file: 'transifex_input.json'
on 'zh_CN'.

Sync of partially translated files: 
untranslated content is included with an empty translation 
or source language content depending on file format

translations/frontend-app-course-authoring/src/i18n/messages/zh_CN.json

@@ -161,6 +161,12 @@
   "course-authoring.schedule.alert.success.aria.labelledby": "alert-confirmation-title",
   "course-authoring.schedule.alert.success.aria.describedby": "alert-confirmation-description",
   "course-authoring.schedule.alert.success": "您所作的变更已保存。",
+  "course-authoring.schedule.alert.load.fail.aria.labelledby": "alert-confirmation-title",
+  "course-authoring.schedule.alert.load.fail.aria.describedby": "alert-confirmation-description",
+  "course-authoring.schedule.alert.load.fail": "We encountered an error when loading your settings.",
+  "course-authoring.schedule.alert.fail.aria.labelledby": "alert-confirmation-title",
+  "course-authoring.schedule.alert.fail.aria.describedby": "alert-confirmation-description",
+  "course-authoring.schedule.alert.fail": "We encountered an error when saving your changes.",
   "course-authoring.schedule.schedule-section.error-message-1": "The certificates display behavior must be 'A date after the course end date' if certificate available date is set.",
   "course-authoring.schedule.schedule-section.error-message-2": "选课截止日期应在课程结束日期之前。",
   "course-authoring.schedule.schedule-section.error-message-3": "选课开始日期应该早于选课截止日期。",