Mattermost 웹훅 URL 설정 확인 로직 추가

.gitea/workflows/main.yml

@@ -2,7 +2,7 @@
 name: Run Report Table
 on:
   schedule:
-    - cron: "11 4 * * *"
+    - cron: "18 4 * * *"
 jobs:
   run-script:
     runs-on: ubuntu-latest