fix(ListItem): Accordion children areas were not hidden

[monk-lee]

Motivation

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• Jest Unit Test
• Checked with example app

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation using yarn docs-build-api
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

Additional context

[codecov]

Codecov Report

Merging #3517 (b35a680) into next (350ef21) will decrease coverage by 0.03%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             next    #3517      +/-   ##
==========================================
- Coverage   79.21%   79.18%   -0.04%     
==========================================
  Files          87       87              
  Lines        1804     1806       +2     
  Branches      791      810      +19     
==========================================
+ Hits         1429     1430       +1     
- Misses        368      369       +1     
  Partials        7        7              

Impacted Files	Coverage Δ
packages/base/src/ListItem/ListItem.Accordion.tsx	77.77% <50.00%> (-2.23%)	⬇️

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[arpitBhalla]

Thanks