🎨♿ Fix keyboard-selected + hovered date text color for accessibility

[balajis-qb]

Problem
This PR focus a small accessibility related issue in the DatePicker. When a day is both keyboard selected and mouse hovered, it's color is black which makes it hard to read in it's dark background color. In this PR, I just reset the color back to white for keyboard selected + mouse hovered day.

Changes

• Reset the style back to white

Screenshots

The Issue

After the fix

Contribution checklist

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

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.29%. Comparing base (09af697) to head (aa35b3e).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5955   +/-   ##
=======================================
  Coverage   97.29%   97.29%           
=======================================
  Files          30       30           
  Lines        3470     3470           
  Branches     1457     1472   +15     
=======================================
  Hits         3376     3376           
  Misses         94       94           

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