[docs] Fix typo in code comment

[lkb85]

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Summary of Changes

This PR fixes typos in code comments across several files to improve code readability and maintainability.

Modified Files

• packages/pigment-css-react/src/processors/styled.ts
• packages/pigment-css-react/src/generateAtomics.js
• packages/pigment-css-utils/src/base-processor.ts
• packages/pigment-css-unplugin/src/index.ts
• packages/pigment-css-nextjs-plugin/src/index.ts

Breaking Changes

N/A

Verification

• Self-reviewed the changes
• Verified that no functional code was altered