fix: don't update schedule if frequency is alread set to the same value

[TBonnin]

We were always updating the frequency even when we didn't need to.

This doesn't address the log saying frequency has been updated. I will do that later

Checklist before requesting a review (skip if just adding/editing APIs & templates)

• [ ] I added tests, otherwise the reason is:
• [ ] I added observability, otherwise the reason is:
• [ ] I added analytics, otherwise the reason is: