TeamCity: Update cron to use Sun=1...Sat=7 days of week

[SarahFrench]

Latest sequel to #8560

Release Note Template for Downstream PRs (will be copied)

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

Terraform GA: Diff ( 2 files changed, 2 insertions(+), 2 deletions(-))
Terraform Beta: Diff ( 2 files changed, 2 insertions(+), 2 deletions(-))

[SarahFrench]

This change would not need pushing to FEATURE-BRANCH-test-teamcity. Everything should be fine if this PR is included in the TeamCity config changes that are going to be pushed to FEATURE-BRANCH-major-release-5.0.0 ; the TeamCity projects are due to swap over to using those downstream branches next week and that's likely to be before Wed/Thurs when this cron issue occurs

[shuyama1]

Thanks for fixing it!