[#356] Updated aria-live for error message to assertive.

[febdao]

Checklist before requesting a review

• I have formatted the subject to include the issue number
  as [#123] Verb in past tense with a period at the end.
• I have provided information in the Changed section about WHY something was
  done if this was a bespoke implementation.
• I have performed a self-review of my code.
• I have commented on my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• I have run new and existing relevant tests locally with my changes,
  and they have passed.
• I have provided screenshots, where applicable.

Changed

1. Updated aria-live for error message to assertive.

Screenshots

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 23.17%. Comparing base (caf1cb1) to head (57face1).
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #455   +/-   ##
=======================================
  Coverage   23.17%   23.17%           
=======================================
  Files          27       27           
  Lines        1312     1312           
  Branches      312      312           
=======================================
  Hits          304      304           
  Misses        812      812           
  Partials      196      196           

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