Subscribe section bottom line closer to input field

[abhivyakti2]

# Description

I have fixed the issue in the "Subscribe Us" section where the horizontal line appeared too far below the input field and submit button, leading to a disjointed appearance. The styling for margin and padding has been adjusted to reduce the unnecessary spacing, ensuring consistent spacing for a cleaner and more unified look.

## Fixes #1261

This pull request addresses issue #1261 , improving the layout and user experience.

## Screenshots

| BEFORE |

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| AFTER |

## Checklist

• [x ] Tests have been added or updated to cover the changes.
• [x ] Documentation has been updated to reflect the changes.
• [x ] Code follows the established coding style guidelines.
• [x ] All tests are passing.

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@SurajPratap10 If change acceptable kindly merge and assign me this PR and add labels : hacktoberfest-accepted, gssoc-ext, any level label suitable

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[SurajPratap10]

Look Good