fix: remove var redeclaration in syncSkillsHiddenInput to prevent variable shadowing

[akhilmodi29]

What does this PR do?

Fixes a variable shadowing bug in syncSkillsHiddenInput() where skillsHidden was being re-declared with var inside an if block, potentially causing selected skills to not be passed correctly to the recommendation API.

Changes Made

• Removed var keyword from inside the if block in syncSkillsHiddenInput() in static/script.js
• The outer skillsHidden variable is now correctly updated instead of a new local variable being created

Type of Change

• Bug fix

Testing

• Tested locally with python app.py
• Added skills via text input and quick-pick chips
• Skills correctly passed to API on form submission
• No existing functionality broken

Related Issue

Closes #616

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[akhilmodi29]

@komalharshita Please review this PR and add the required labels including gssoc:approved. This fixes the variable shadowing bug in syncSkillsHiddenInput — the hidden skills input is now correctly updated, ensuring selected skills are properly passed to the recommendation API.
Labels suggested:

level:intermediate
type:bug
quality:clean

[akhilmodi29]

@komalharshita Please review and merge with appropriate labels including gssoc: approved

[akhilmodi29]

@komalharshita Please Review and merge with all appropriate labels including gssoc: approved

[akhilmodi29]

@komalharshita Please Review and merge with all appropriate labels including gssoc: approved