Storybook: Fix warnings in Layout document

[tyxla]

What?

Fixing a warning and an error in the Foundations: Layout document in Storybook.

Why?

To keeping code high quality and prevent unnecessary warnings and errors.

Found while working on #67863.

How?

We're importing from @storybook/blocks and adding a tbody wrapper.

Testing Instructions

• Open http://localhost:50240/?path=/docs/foundations-layout--page
• Verify you no longer see the warning and the error from the screenshot.

Testing Instructions for Keyboard

Same

Screenshots or screencast

[github-actions]

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Co-authored-by: tyxla <[email protected]>
Co-authored-by: jameskoster <[email protected]>
Co-authored-by: mirka <[email protected]>

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[mirka]

Thank you!