docs: fix inconsistent casing in Comparison screenshot filename refer…

[Mohit-001-hash]

Description

Fixed an inconsistent image filename reference in README.md's Screenshots section — every screenshot filename uses lowercase-with-hyphens except one (Comparison.png), which was capitalized.

Linked Issue

Fixes #None (just a documentation quick fix)

Changes Made

• Updated the "Comparison" screenshot reference from assets/Comparison.png to assets/comparison.png to match the naming convention used by all other screenshots

Type of Change

• Documentation update

Testing

• Tested locally
• Tested on mobile viewport (if applicable)
• No console errors introduced

Checklist

• My code follows the project's coding style
• I have formatted my code locally by running npx prettier --write . before submitting
• I am submitting my PR from a dedicated feature/* branch, not the main branch
• I have performed a self-review of my code
• My changes generate no new warnings or errors
• I have updated documentation if required
• I have linked the relevant issue

Screenshots / Screen Recording

N/A — documentation-only fix, no visual/UI change.

[github-actions]

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Formatting and Branching

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