Picking letterSpacing values from theme

[definiteIymaybe]

Describe the bug

Hi! I may be missing something, but I can't get letterSpacing prop values to be looked up from theme's letterSpacings section. Any string value of the letterSpacing prop seems to be pushed to CSS as letter-spacing verbatim.

To Reproduce

1. Go to Vue Starter starter example from the docs (or my fork).
2. Add letterSpacing="tight" to the CHeading element.
3. Look up CSS props of the rendered h2 element.

Expected behavior

Expected tight to be transformed to -0.025em as per theme.letterSpacings.tight.

Screenshots

Chakra UI Vue starter bevahior:

Chakra UI example with letterSpacing="tight"on Textelement: