Add 2022-10-20-Umich workshop to workshops list

[sklucas]

Hi! I'd like to update the workshops list to reflect the upcoming event.

title: Workshop date: 2022-10-20 end_date: 2022-10-21 instructors:

• Sarah Lucas
• Kelly Sovacool
• Nick Lesniak
• Pat Schloss
• Corwin Kerr helpers:
• Grace Kenney

• Pariksheet Nanda site: https://umcarpentries.org/2022-10-20-UMich/ registration: https://ttc.iss.lsa.umich.edu/ttc/sessions/software-carpentry-workshop-unix-r-and-git/ material: R, bash, git audience: University of Michigan researchers

[kelly-sovacool]

I setup a cron job via GitHub Actions to do this automagically once per week, but for some reason GitHub Actions hasn't actually run that job in a long time. I'll try to trigger it manually.