fix: 更新定时任务的 cron 表达式

.github/workflows/docker-image-dev.yml

@@ -2,7 +2,7 @@ name: Docker Build and Push (Dev)
 
 on:
   schedule:
-    - cron: '42 7 * * *'
+    - cron: '0 0 * * *'
   # push:
   #   branches:
   #     - dev