chore: add hint to avoid top of hour (#19)

* Hint to avoid top of hour

Since we know people copy this template, give a gentle nudge in the comment and schedule for people to not always run at the top of the hour (or at midnight)

* Stronger hint

* Update schedule-template.yaml

schedule-template.yaml

@@ -17,6 +17,10 @@ instances:
   - name: INSTANCE_ID
     databases:
       - name: DATABASE_ID
-        schedule: 0 * * * * # run hourly
+        schedule: 42 * * * * # Run hourly at a "random" minute 
+                             # to follow best practices with cron and
+                             # avoid scheduling all jobs at exactly
+                             # the same time.
+                             # Please change 42 to your favorite number!
         expire: 6h # the backup will expire after 6 hours
         time_zone: Australia/Sydney # optional. "utc" is the default value.