fix: Breadcrumb dropdown items have same color on mouse or keyboard interaction

[johannes-weber]

Description

Before this change, Breadcrumb group's dropdown items had different colors when navigating via keyboard or via mouse.

With this change, the dropdown items do have the same color on mouse and kyboard interaction.

Related links, issue #, if available: AWSUI-60237

How has this been tested?

• Tested manually.
• How to test: open the breadcrumb group test page, open the dropdown with either keyboard or mouse, navigate in between the items and observe the selected items text color.

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.42%. Comparing base (0938d47) to head (2db8fa3).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #3288    +/-   ##
========================================
  Coverage   96.42%   96.42%            
========================================
  Files         791      791            
  Lines       22574    22575     +1     
  Branches     7388     7805   +417     
========================================
+ Hits        21766    21767     +1     
+ Misses        801      754    -47     
- Partials        7       54    +47     

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