Sorted JavaScript Job Sites list alphabetically

[Akanksha-Patnaik]

This pull request arranges JavaScript Job Sites section in the README file in alphabetical order for better readability and organization.
No links or content were changed — only the order was updated.
Fixes #32

[Copilot]

Pull Request Overview

This pull request reorganizes the JavaScript Job Sites section in the README file by sorting the job site links alphabetically. This improves the document's readability and makes it easier for users to find specific job sites.

• Reordered JavaScript job site links alphabetically
• Maintained all existing links and content without modification
• Enhanced document organization and user experience

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