docs(examples): update examples to use react18

[TkDodo]

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[codecov]

Codecov Report

Merging #3466 (b9dd2fe) into beta (231b543) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             beta    #3466   +/-   ##
=======================================
  Coverage   96.94%   96.94%           
=======================================
  Files          46       46           
  Lines        2391     2391           
  Branches      714      714           
=======================================
  Hits         2318     2318           
  Misses         71       71           
  Partials        2        2           

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[tannerlinsley]

🎉 This PR is included in version 4.0.0-beta.2 🎉

The release is available on:

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• GitHub release

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