Added Hover Effect for the subscribe to newsletter button

[Saipradyumnagoud]

Related Issue

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Description

Added Hover Effect for the subscribe to newsletter button

closes #474

Type of PR

• [ ] Bug fix
• [ x] Feature enhancement
• [ ] Documentation update
• [ ] Other (specify): ___

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Checklist:

• [ x] I have performed a self-review of my code
• [x ] I have read and followed the Contribution Guidelines.
• [x ] I have tested the changes thoroughly before submitting this pull request.
• [x ] I have provided relevant issue numbers, screenshots, and videos after making the changes.
• [ x] I have commented my code, particularly in hard-to-understand areas.

Additional context:

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[Saipradyumnagoud]

@CSEdgeOff can you please review this pull request