fix: fixed header nav item alignment

[Anish99594]

Fixed Header nav item alignment

Fixes #190

• Bug fix (non-breaking change which fixes an issue)

• go to homepage
• reduce the size of the screen with different sizes and look at navigation alignment.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code

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[bhansa]

@Anish99594 any update on this? I think the issue is only for tablet, can you make change only for tablet or extend the mobile media query.