ecr-viewer lab info section missing visual indicators on accordion buttons

[BobanL]

Action Requested

• Add visual focus indicator on lab result accordion buttons

Acceptance Criteria

• Visual focus indicator is on each accordion button in lab results.

Additional Information

• https://cdc-devtools.dequecloud.com/issues/ad946c8a-5bfc-4a72-b0e5-8265d37aa3e0
• https://docs.deque.com/issue-help/1.0.0/en/focus-indicator-missing
• Example of missing indicator (those accordion header buttons should have focus indicators). https://github.com/CDCgov/phdi/assets/10108172/43da25ad-da1d-453b-a641-b301a49acec7