fix: 🤔 forms-template - wrap error text for sd-checkbox to second line

[coraliefeil]

Current behavior

Error text for required & invalid sd-checkbox is displayed in the same line as the checkbox label text.

Expected behavior

Error text is always below the checkbox label text / wraps to the next line.

Steps to reproduce

https://solid-design-system.fe.union-investment.de/docs/?path=/docs/templates-forms--docs#contact-form

Suggested Reproduction Tools

Technical Information

DoR

• Item has business value
• Item has been estimated by the team
• Item is clear and well-defined
• Item dependencies have been identified