feat(Calendar): Added aria-current for todayDate in Calendar cell

[Shubhdeep12]

Closes

✅ Pull Request Checklist:

• Included link to corresponding React Spectrum GitHub Issue.
• Added/updated unit tests and storybook for this change (for new code or code which already has tests).
• Filled out test instructions.
• Updated documentation (if it already exists for this component).
• Looked at the Accessibility Practices for this feature - Aria Practices

#8590

📝 Test Instructions:

🧢 Your Project:

[reidbarber]

Thanks for the PR. At a quick glance, the 'aria-current' change makes sense, but it might need some further testing with screen readers just to double check that there is an improved experience.

For the class name change, we don't support custom class names in React Spectrum (outside of UNSAFE_className). I don't think we want this on the cell.

For React Aria, custom class names are already supported on the cell via the className prop.

[Shubhdeep12]

oh yes, we can pass custom className to the cell itself. I might have overlooked that and added support for setting className unnecessarily.
this makes sense, I'll update the PR to just include the aria-current change.
thanks for the review!

[snowystinger]

I tried it out in MacOS VO. We already announce "Today", and all this adds is "current date", which seems a bit repetitive.

Would like to know if there are any other screen readers where this doesn't duplicate known information. If they are all like this, or don't say anything, then I think this is unnecessary.
@majornista anything I'm overlooking?