Fix workflow to update dependencies

[henrymercer]

This is failing with a similar problem to #1544:

npm ERR! code EACCES
npm ERR! syscall open
npm ERR! path /Users/runner/.npm/_cacache/tmp/ded008dd
npm ERR! errno -13
npm ERR! 
npm ERR! Your cache folder contains root-owned files, due to a bug in
npm ERR! previous versions of npm which has since been addressed.
npm ERR! 
npm ERR! To permanently fix this problem, please run:
npm ERR!   sudo chown -R 501:20 "/Users/runner/.npm"

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/runner/.npm/_logs/2023-02-24T19_48_49_727Z-debug-0.log
Error: Process completed with exit code 243.

Port over the fix from #1544 and share code so these scripts don't get out of sync again.

Merge / deployment checklist

• Confirm this change is backwards compatible with existing workflows.
• Confirm the readme has been updated if necessary.
• Confirm the changelog has been updated if necessary.

[henrymercer]

Ah of course, adding the label triggers the workflow on main.