Update Elements sketch file with design tokens

[foxintherain]

What

Update the sketch styleguide with the new naming for design tokens (color, typography etc) https://www.sketch.com/s/fa9c2fc9-a179-43f0-b21e-9562c9c17c0c

Why

Ensure that designs are in sync with elements and that designers use the same terminology as developers

Done when

• [x] Colors are renamed
• [x] Typography are renamed
• [x] Review with @sturobson