Add support for capitalize to text-transform

[Tonkpils]

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What are you trying to accomplish?

Add support for capitalize on text-transform. It's already supported by the CSS class text-capitalize https://primer.style/design/foundations/css-utilities/typography#typographic-styles

Risk Assessment

• Low risk the change is small, highly observable, and easily rolled back.
• Medium risk changes that are isolated, reduced in scope or could impact few users. The change will not impact library availability.
• High risk changes are those that could impact customers and SLOs, low or no test coverage, low observability, or slow to rollback.

What approach did you choose and why?

Added the change to the list where these utilities are already defined

Anything you want to highlight for special attention from reviewers?

Is there anything else that needs to be updated?

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews (Lookbook)
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge

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[changeset-bot]

🦋 Changeset detected

Latest commit: 9978e64

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@primer/view-components	Patch

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[camertron]

Shoot, sorry @Tonkpils! That change to utilities.yml was required to get tests to pass. I ran rake utilities:build which added it back in. Apologies for the noise.