Fix Debug JS Errors wording in application-errors.mdx

[Elphazy]

Capitalized JavaScript and clarified the sentence for beginners.

Description

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Pull request type

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• [ ] Review Fixes
• [ ] Documentation Overhaul
• [ ] Feature/Story
  • Link one or more Engineering Tickets *
• [ ] A-Force
• [ ] Error in documentation
• [ ] Maintenance

Documentation tickets

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Checklist

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• [ ] Checked for Grammarly suggestions.
• [ ] Adhered to the writing checklist.
• [ ] Adhered to the media checklist.
• [ ] Verified and updated cross-references or added redirect rules.
• [ ] Tested the redirect rules on deploy preview.
• [ ] Validated the modifications made to the content on the deploy preview.
• [ ] Validated the CSS modifications on different screen sizes.

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