🛠 Tooling: add schedule to pages deploy

[tjwds]

Bug Report Checklist

• [X] I have tried restarting my IDE and the issue persists.
• [X] I have pulled the latest main branch of the repository.
• [X] I have searched for related issues and found none that matched my issue.

Overview

I did a whoopsie. We should regularly deploy the website to make sure we're updating the events on the homepage even if the website hasn't changed, but my recent commit in build.yml isn't enough! We need to do something in pages.yml.

(I'll take this one, since it involves shenanigans with our GitHub org.)

Additional Info

No response