Update updatePassword.js

[Deekshant1112]

1 Used bcrypt.genSalt and bcrypt.hash methods which are asynchronous instead of synchronous bcrypt.hashSync.

2 Simplified salt generation by using bcrypt.genSalt. Renamed variables for clarity and consistency.

3 Improved error handling using try-catch blocks.

4 Updated the status codes for better response handling. 5 Used template literals for string interpolation.

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Checklist

• [ ] I have tested these changes
• [ ] I have updated the relevant documentation
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the codebase
• [ ] My changes generate no new warnings or errors
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