Fix <Link> cannot be styled through MUI theme

[djhi]

Fixes #10904

Problem

<Link> cannot be styled through MUI theme

Solution

Fix usage of MUI styled function

How To Test

• Story
• Use the story controls to test a custom theme

Additional Checks

• The PR targets master for a bugfix or a documentation fix, or next for a feature
• The PR includes one or several stories (if not possible, describe why)
• The documentation is up to date

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