(#2101, #2102) Accordion Init Bug + 16x9 Images Update

[karlikpj]

Closes #2101

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Author PR Checklist

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General:

• I have reviewed the acceptance criteria defined in the ticket and ensured the work has been completed.
• The commit message passes all quality commit message standards.
• Unit tests have been updated or created to reflect any javascript changes.
• Storybook scenarios have been updated or created to reflect any html/css/js changes.

Accessibility:

• WCAG 2.1 Level AA requirements have been met.

Development:

• Any new or updated javascript code has 100% unit test coverage.
• New or updated breakpoints have regression images.
• Breaking changes have been thoroughly documented in the PR.

Product Reviewer PR Checklist

Items the product team is responsible for reviewing.

General:

• There are no unexpected or unapproved regression image changes.

• Functionality of interactive elements meet the acceptance criteria.
• The product is visually and functionally the same across the different browsers.

Accessibility:

• AxeDev Tools: there are no new or outstanding accessibility issues introduced in this PR.
• Lighthouse: scores have not noticeably decreased during this PR.
• Wave: there are no new errors or contrast errors introduced in this PR.

Design Reviewer PR Checklist

Items the design team is responsible for reviewing. 


General:

• New or updated features introduced in this PR are developed mobile-first.
• Breakpoint changes and regression images match those breakpoints.
• This PR has been tested in all supported browsers at all breakpoints.

Developer Reviewer PR Checklist

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General:

• New code passes code quality standards set by industry standards.
• The expected Storybook stories have been added or updated for the new or updated feature.
• The expected unit tests have been added or updated for the new or updated feature.

Accessibility:

• VoiceOver: Described content matches with what was expected.
• Keyboard navigation: new or updated features and content are navigable via the keyboard.

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• The documentation site
• NCIDS JS Documentation
• The storybook site
• The example site

[github-actions]

Viewing Information

• The documentation site
• NCIDS JS Documentation
• The storybook site
• The example site