Update meeting page template to change default open meeting time

[kathycarothers]

RELEASE DEPLOYED 12/18. Safe to do in 23.4 sprint. :)

Summary

What we're after:
OCS has indicated that meeting times will go back to start meetings at 10:00. We need to update the default time in the meeting page template so that users interested in Commission meetings have accurate information.

Completion criteria

• After December 14th the default time is changed on the meeting page template to 10 am
• Alert Content team once the time is changed to publish the meeting pages

[dorothyyeager]

This ticket can be closed once the PR is merged. For @kathycarothers @djgarr @patphongs: 2024 meeting pages can be published after the 23.4 release is deployed on December 18.