Improve Color Contrast for "What Our Users Say" Section in Dark Mode

[lovelymahor]

Describe the feature

The "What Our Users Say" section on the About page has poor color contrast in dark mode, making the text difficult to read. This affects user experience and readability, particularly for those who prefer dark mode.

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• I agree to follow this project's Code of Conduct
• I'm a GSSOC'24 contributor
• I want to work on this issue

[github-actions]

Congratulations, @lovelymahor! 🎉 Thank you for creating your issue. Your contribution is greatly appreciated, and we look forward to working with you to resolve the issue. Keep up the great work!

We will promptly review your changes and offer feedback. Keep up the excellent work! Kindly remember to check our contributing guidelines

[lovelymahor]

Please assign it to me I want to work on this issue. Also, please add the label GSSOC and the level that you find appropriate for this issue. thank you!