fix(button): fix import statement for Link component in button component docs

[krishnagkmit]

Fix: Correct Link import to use default export

This PR updates the import statement for the Link component in the Button documentation.

• Fixes [bug]: import statement for Link is incorrect in a snippet of button component docs #8425

What Changed

• The import statement now correctly imports Link as a default export instead of a named export.

Why

• Previously, Link was imported as a named export, which is incorrect and causes import errors.
• The Link component should be imported as the default export to match its actual export structure.

Impact

• Prevents import errors for users copying the example.
• Ensures documentation accurately reflects the correct usage of the Link component.

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