Added hover effect in dark mode

[Aakash441]

Hover effect in dark mode#97

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Checklist:

• [] I have mentioned the issue number in my Pull Request.
• [] I have commented my code, particularly in hard-to-understand areas
• [] I have created a helpful and easy to understand README.md

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[pranjay-poddar]

Can you apply same effect in light mode also?

[Aakash441]

Ok, will work on it.