Update react syntax to v18

[carl-printreleaf]

Fixes # . No issue

Changes: Update React syntax to v18

Please ensure that:

• [x] Changelog is updated if not a minor patch
• [x] Ruby linting is ok: rubocop is all green
• [x] Javascript linting is ok: cd javascript/webpacker_react-npm-module/ && yarn lint is all green
• [x] Tests are all green