fix(fieldset): xs breakpoint

[thomas-krueger-axa]

Closes #2436

Fixes #

Merge Checklist:

• [ ] Code selfreview has been performed (Best Practices).
• [ ] Tests are sufficient.
• [ ] Documentation is up to date.
• [ ] Changelog is up to date.
• [ ] Typescript typings for properties are up to date.
• [ ] Designers approved changes or no approval needed.
• [ ] Dependencies to other components still work.

[domirs]

@thomas-krueger-axa are there any news on when this will be released?

[thomas-krueger-axa]

@domirs i've just released a fix (version 6.1.2). could you test it please?

[domirs]

@thomas-krueger-axa looks good now. thx