fix gap on modal "submit your API" (issue #270)

[DomeT99]

Description

Hi everyone, I open this PR to fix the issue in question by adding a gap to the two fields.
I set the width of the "modal-content" to "auto" to make it more consistent with new changes.

Related Issues

Issue #270

Checklist

• My submission is formatted according to the guidelines in the contributing guide
• My submission has a useful description
• Code follows the established CODE_OF_CONDUCT guidelines.
• Code has been tested thoroughly.
• All commit messages are descriptive and follow the established commit message format.
• Pull request description clearly describes the changes included in the pull request.
• I have searched the repository for any relevant issues or pull requests
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[gdjohn4s]

Welcome back @DomeT99 😄
Thanks for your support 🙏 We'll review your pr soon.