fix: 🤔 Incorrect exportparts in autocomplete-config

[kirchsuSICKAG]

Current behavior

The autocomplete-config.ts file is currently providing two parts, which can be used for styling: the listbox part and the popup__content.
Currently only the listbox part is working.

Expected behavior

Both parts listbox and popup__content are working.

Steps to reproduce

Technical Information

The popup__content is exported via:

    popup?.setAttribute('exportparts', 'popup__content');

but the popup component does not have a part called 'popup__content' but only 'popup'

So the fix would be to either do one of the following:

popup?.setAttribute('exportparts', 'popup:popup__content');
popup?.setAttribute('exportparts', 'popup');

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