Remove outline on focus for consistent link and button styling

[MohamadSalman11]

Description

I removed the outline from buttons when focused via keyboard navigation, causing a white border to appear around buttons while links remain without a border.

Please let me know if I missed anything! 😊

Before 🤔:

After 😊:

Motivation & Context

Links and buttons will now have the same style when navigating with the keyboard

Type of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactoring (non-breaking change)
• Breaking change (fix or feature that would change existing functionality)

Checklist

• I have read the contributing guidelines
• My code follows the code style of the project (using npm run lint)
• My change introduces changes to the documentation
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed

Live previews

• https://deploy-preview-41194--twbs-bootstrap.netlify.app/