fix: correct typo in code comment

[lkb85]

Description

This PR fixes typos in code comments within the following files: packages/plugin-react/src/index.ts and packages/plugin-react/src/refreshUtils.js.

Additional context

N/A

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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• Read the Contributing Guidelines.
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