fix: calendar spacings for mobile on availability page

[alpavlove]

What does this PR do?

it fixes a small visual issue for the availability page for mobile devices
Before:

After:

Loom Video: https://www.loom.com/share/e53bccb5c7814e468b2052349c583831

Environment: Staging(main branch) / Production

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Chore (refactoring code, technical debt, workflow improvements)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How should this be tested?

• Login on a mobile device
• Create an event
• Preview the event
• See the is small padding on the bottom of the calendar

Thanks for creating this great project. If there are more issues available to contribute, I would be happy to. Cheers!

[vercel]

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