auro-carousel: Carousel arrow not centered in button

[erikalanghauser]

Describe the bug

The L/R arrows are not centered within the carousel buttons and look out of alignment. (The chevron icon seems to be floating high within the button.)

To Reproduce

Steps to reproduce the behavior:

1. Go to https://auro.alaskaair.com/components/auro/carousel to see it in action.

Expected behavior

L/R chevron/arrow icon should be perfectly centered within the carousel buttons (as demonstrated in this figma showing the icon square border):

Screenshots

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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context

Add any other context about the problem here.