Link: Update Legal Link Colors

[soniamacias]

Description

We have an update to the legal link token:

• Add color.core.blue.650
• Update color.link.legal to use color.core.blue.650 in light mode

This relates to #2564

Screenshots

No response

Figma link

No response

Engineering pre-requisites

• Supports dark mode.
• Supports responsive design.
• Tokens have been provided (or already exist).

[ArtBlue]

Per internal discussion, the specs needs to be as follows:

Platforms will need to:
Add color.core.blue.650 #003AA5
Update color.foreground.link.legal to use color.core.blue.650 as its value in light mode

Dark mode should be color.core.blue.400