fix: property 'children' does not exist in React 18

[arpitBhalla]

Motivation

Fixes #3628

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 #3663 (bb9f10c) into next (67eb98b) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             next    #3663   +/-   ##
=======================================
  Coverage   79.40%   79.40%           
=======================================
  Files          87       87           
  Lines        1821     1821           
  Branches      812      812           
=======================================
  Hits         1446     1446           
  Misses        370      370           
  Partials        5        5           

Impacted Files	Coverage Δ
packages/themed/src/config/withTheme.tsx	86.48% <100.00%> (ø)

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