[bug] hex codes for color-context.css will change with tokens update

[zeroedin]

From @marionnegp on #1318 (comment)

FYI, the fallback hex code for rh-color-surface-darker will change to #292929 in the next tokens update.

@bennypowers follows up with #1318 (comment)

As long as we specify the mappings between old and new names, the linter should fix this automatically. Let's sync on this early this week Nov 6

Reference RedHat-UX/red-hat-design-tokens#119

[bennypowers]

1. after chore: prepare release red-hat-design-tokens#115 merges and we release @rhds/[email protected], we will need to
2. update the dep here
3. copy over the stylelint rules from the tokens 2 changeset
4. run stylelint --fix here
5. check for visual regressions