fix: 🤔 missing border when sd-select has not enough space

[mariohamann]

Current behavior

When the size of the select popup is reduced beacuse of less space on the screen, the bottom border is missing.

Expected behavior

bottom border is there.

Steps to reproduce

Open sd-select here: https://codepen.io/mariohamann/pen/oNOKqxX

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

DoD

• Documentation has been created/updated (if applicable)
• Migration Guide has been created/updated (if applicable)
• Relevant E2E tests (Features, A11y, Bug fixes) are created/updated
• Relevant stories (Features, A11y) are created/updated
• Implementation works successfully on feature branch