Date-Picker: Days of week accessibility issue

[coliff]

Prerequisites

• I have searched for duplicate or closed issues
• I have read the contributing guidelines

Describe the issue

The Modus Datepicker days of week are abbreviated which causes issues for screen-readers. There's a relatively easy fix for this suggested by the official ARIA Authoring Practices Guide (APG).

https://www.w3.org/WAI/ARIA/apg/patterns/dialog-modal/examples/datepicker-dialog/#:~:text=To%20facilitate%20compact,navigate%20the%20grid.

Reduced test cases

No response

What operating system(s) are you seeing the problem on?

Windows

What browser(s) are you seeing the problem on?

Microsoft Edge

What is the issue regarding ?

@trimble-oss/modus-web-components

What version of npm package are you using ?

latest

Priority

Medium

What product/project are you using Modus Components for ?

Modus

What is your team/division name ?

Modus

Are you willing to contribute ?

No

Are you using Modus Web Components in production ?

Modus