Update stylelint

[cedarstay]

Is your enhancement related to a problem? Please describe.
Stylelint currently throws an error for @media (prefers-color-scheme: dark).

Describe the solution you'd like
Theme scaffold is currently using stylelint version ^9.10.1. The prefers-color-scheme keyword was added in version 10.0.0. I would suggest updating to 11.0.0 (latest version is 13.6.1).

[dainemawer]

Thanks for bringing this to our attention @cedarstay ! @timwright12 feel free to assign this to me, I'll get a patch out.

[jeffpaul]

@dainemawer pinging you again to see if you've got a PR coming on this?