fixing color variables for text

[helms-charity]

Buttons, plain text, bold text, and linked text color variables are all complete with this PR.

Fix #557

Test URLs:

• Before: https://main--sling--aemsites.aem.page/library/blocks/columns
• After: https://557-textcolors--sling--aemsites.aem.page/library/blocks/columns

Screenshot of the authored area:

Screenshot of the rendered area of my branch link:

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Commits

• 9191526 ✅ (latest)
• c04225d ✅
• b129530 ✅

[aem-code-sync]

	Page	Scores	Audits	Google
📱	/library/blocks/columns
🖥️	/library/blocks/columns