chore(gh): Expand update window

I've been having some repos not updated lately.  RenovateBot project's theory is
that its because RenovateBot is scheduled to run once every 3 hours and
checks the schedule at that point while the schedules I use only offers
an exact 3 hour window, making this a race condition.  The schedule
originally came from RenovateBot but they changed their polling
schedule.

See renovatebot/renovate#23642 (reply in thread)

.github/renovate.json5

@@ -1,6 +1,6 @@
 {
   schedule: [
-    'before 3am on the first day of the month',
+    'before 5am on the first day of the month',
   ],
   semanticCommits: 'enabled',
   configMigration: true,