refactor: square gallery icons

[AnmolBansalDEV]

Thank you for your contribution to the Koda - Generative Art Marketplace.

👇 __ Let's make a quick check before the contribution.

PR Type

• Bugfix
• Feature
• Refactoring

(please remove design and QA checks below if not needed)

Needs Design check

• @exezbcz please review

Needs QA check

• @kodadot/qa-guild please review

Context

• Closes Gallery item icon not perfect square #10163
• Requires deployment <worker/stick/speck>

Before submitting pull request, please make sure:

• My contribution builds clean without any errors or warnings
• I've merged recent default branch -- main and I've no conflicts
• I've tried to respect high code quality standards
• I've didn't break any original functionality

Optional

• I've tested it at </ahp/collection>
• I've tested PR on mobile
• I've written unit tests 🧪
• I've found edge cases

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• Fill up your DOT address: Payout

Community participation

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Screenshot 📸

• My fix has changed something on UI; a screenshot is best to understand changes for others.

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[codeclimate]

Code Climate has analyzed commit 58ed8b1 and detected 0 issues on this pull request.

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