Adjust alignment styling for widget extension

What does this MR do and why?

Adjusts the styles for the link and supportingText sections of the widget extensions.

Screenshots or screen recordings

Before	After

How to set up and validate locally

• In a rails console enable flag Feature.enable(:refactor_license_compliance_extension)
• Reach out to me for a demo, or attempt steps below
• Clone the https://gitlab.com/gitlab-examples/security/security-reports project locally
• Set up Allowed/Denied licenses in https://<localhost>/<group>/<project>/-/licenses#policies
• Create a new MR
• See License compliance widget

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #355958 (closed)