Vote-783: style usagov footer section

[SamiraMSadat]

Jira ticket

VOTE-783

Description

Style the USAgov identifier section of the footer

Deployment and testing

Pre-deploy

1. lando retune

Post-deploy

1. Rebuild the theme

QA/Test

1. Confirm the styling matches the design for desktop and mobile
2. Confirm the active and focus states are correct for the usagov links menu

Checklist for the Developer

• A link to the JIRA ticket has been included above.
• No merge conflicts exist with the target branch.
• Automated tests have passed on this PR.
• A reviewer has been designated.
• Deployment and testing steps have been documented above, if applicable.

Checklist for the Peer Reviewers

• The file changes are relevant to the task objective.
• Code is readable and includes appropriate commenting.
• Code standards and best practices are followed.
• QA/Test steps were successfully completed, if applicable.
• Applicable logs are free of errors.