chore(alerts): move weekly summary Monday -> Saturday

Author: Bartek Ogryczak

src/sentry/conf/server.py

@@ -1108,7 +1108,7 @@ def SOCIAL_AUTH_DEFAULT_USERNAME() -> str:
     "schedule-weekly-organization-reports-new": {
         "task": "sentry.tasks.summaries.weekly_reports.schedule_organizations",
         # 05:00 PDT, 09:00 EDT, 12:00 UTC
-        "schedule": crontab(minute="0", hour="12", day_of_week="monday"),
+        "schedule": crontab(minute="0", hour="12", day_of_week="saturday"),
         "options": {"expires": 60 * 60 * 3},
     },
     "schedule-daily-organization-reports": {