fix: Remove wrong deprecated tag on flashbar interfaces

[rubencarvalho]

Description

Removed wrong @deprecated tag from the items property in the Flashbar component interfaces.

Without this fix, it would generate wrong documentation.

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

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[codecov]

Codecov Report

Base: 92.98% // Head: 92.98% // No change to project coverage 👍

Coverage data is based on head (0238f7c) compared to base (23f9839).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #673   +/-   ##
=======================================
  Coverage   92.98%   92.98%           
=======================================
  Files         574      574           
  Lines       16782    16782           
  Branches     4632     4632           
=======================================
  Hits        15604    15604           
  Misses       1101     1101           
  Partials       77       77           

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