fix(doc): remove unimplemented Dropdown API

[imchell]

Closes #585

📝 Description

onAction & onClose are currently not Dropdown.Item props and may lead to confusion.

💣 Is this a breaking change (Yes/No): No

[codecov-commenter]

Codecov Report

Merging #587 (d86753c) into main (2eb31e5) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #587   +/-   ##
=======================================
  Coverage   74.82%   74.82%           
=======================================
  Files         200      200           
  Lines        3098     3098           
  Branches      956      956           
=======================================
  Hits         2318     2318           
  Misses        765      765           
  Partials       15       15           

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[danielsimao]

@imchell commit and PR title typo

[imchell]

@danielsimao Thanks!

[jrgarciadev]

Thanks a lot! @imchell 🙏🏻