fix: Add aria-label to read the day of the week instead of the shorthand

[plahteenlahti]

Description

Linked issue: #3185

Problem

When using a screenreader it reads the days in the header as "Mo", "Tu"... etc. instead of the more understandable full name See the linked issue for a more detailed description

Changes

This PR adds aria-labels to the header dates so that the screenreader now reads days with full name e.g. "Monday" instead of "Mo"

Contribution checklist

• I have followed the contributing guidelines.
• I have added sufficient test coverage for my changes.
• I have formatted my code with Prettier and checked for linting issues with ESLint for code readability.

[martijnrusschen]

Can you make sure to add a test for this change?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.09%. Comparing base (4500100) to head (fd4c02e).
Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4693      +/-   ##
==========================================
+ Coverage   97.00%   97.09%   +0.08%     
==========================================
  Files          28       28              
  Lines        2641     2653      +12     
  Branches     1119     1123       +4     
==========================================
+ Hits         2562     2576      +14     
+ Misses         79       77       -2     

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[pullrequest]

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[pullrequest]

PullRequest Breakdown

Reviewable lines of change

+ 32
- 0

97% JavaScript (tests)
3% JavaScript

Type of change

Fix - These changes are likely to be fixing a bug or issue.

[pullrequest]

This is a great improvement for a subtle detail and looks good to me. Thanks for catching this and fixing it!

Ryan

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