fix(Calendar): data-outside-month should be data-outside-view

[canstand]

🔗 Linked issue

#671

❓ Type of change

• 📖 Documentation (updates to the documentation, readme or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

data-outside-month replaced with data-outside-view to enable background color styles for selected dates that are not in the current month.

To keep it the same as ui.shadcn.com, remove data-[outside-view]:pointer-events-none

📸 Screenshots (if appropriate)

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.