fix(AISkeleton): update token values

[tw15egan]

Closes #15825

Changelog

Changed

• Updates the AI Skeleton token values

Testing / Reviewing

Ensure the animation looks correct

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[guidari]

LGTM! 🚀

[aagonzales]

Something isn't right here (design messed up not dev). Just looked at the example is its barely notificable. I just dropped in the updated values Juan gave me with out looking at them but it might actually need some adjusting in code vs figma. Let me take a quick look at things and get back to you.

[aagonzales]

Ok can we update the element values by two steps. Right now you can't see the dark animation at all.

Token	White theme	Gray 10 theme	Gray 90 theme	Gray 100 theme
AI-skeleton-element	Blue 50	Blue 50	Blue 60	Blue 60

[tw15egan]

@aagonzales updated

[aagonzales]

Light theme looks good now but the dark is still too faded. For Gray 90 and Gray 100, let's take the element up to 'Blue 80'. I think that should do it.

[aagonzales]

Ok I think that's good now. Geez what a problem child the dark theme was here.