Humans and Machines content refresh

This is a minor release. It mostly documents things we're already doing.

Here are the changes to the On Humans and On Machines content:

• Added notes on PTO communication.
• Added note on changes to timesheets.
• Added link to mindful meeting template.
• Added update to location posts in post-covid world.
• Added note about UX Team Lunch Hour Huddle.
• Updated to Design Sync format.
• Updated lists of tools and services.

Change are up on the live site.