Fixed issue with static log time | First time contributor

[Vatsal-Patel-09]

Description

• Fixed misleading log message for materialized views refresh task.
• The log claimed it runs "every night at 1am CDT" but actually runs every N days relative to Augur startup time using.
• Updated the message to display the actual configurable interval and removed the incorrect timezone reference.

This PR fixes #3360

Notes for Reviewers

• I am first time contributor trying to get hands on with Open-Source
• feel free to point out error(s) or possible improvement(s) would love to hear and learn!

Signed commits

• [x] Yes, I signed my commits.

[Vatsal-Patel-09]

Thanks! for the feedback, I did the requested changes few days ago , along with proper pluralization instead of "day(s)"

[MoralCode]

Closing as there are multiple parallel solutions and the one proposed in https://github.com/chaoss/augur/pull/3370 is more robust and complete in my opinion