adding dark mode and responsiveness to about us

[Riyachauhan11]

Description

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• This PR does the following:
  • Adds dark mode styling to about us page and fix its responsiveness

Related Issues

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• Placeholder: "Fixes #539"

Changes

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• Fixed a bug in about us page

Testing Instructions

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1. Pull this branch.
2. Run npm install to install dependencies.
3. Run npm test to execute the test suite.
4. Verify that ...

Screenshots (if applicable)

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Additional Context

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• This PR is based on the following...

Checklist

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• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] My changes generate no new warnings
• [x] I am working on this issue under GSSOC

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Name	Status	Preview	Comments	Updated (UTC)
wanderlust-2024	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 10, 2024 9:49am

[github-actions[bot]]

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