Improve alignment and design of "Subscribe to Our Newsletter" section

[Subham1]

Is there an existing issue for this?

• [X] I have searched the existing issues

Describe the code change

The "Subscribe to Our Newsletter" section in the footer needs alignment and design improvements. Ensure it fits well with the overall footer layout and follows responsive design principles. Adjust spacing, fonts, and colors as needed to enhance the visual appeal.

Proposed solution

Ensure the newsletter section is wrapped in a flexbox container for proper alignment. Adjust margins and padding to balance spacing within the footer.

Record

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

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