fix: add "linkedin in" icon name to enumeration to fix console error

[mwaddell]

fixes #4470 by adding the "linkedin in" name to the existing enumerations

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (v2.x@a32499d). Click here to learn what that means.

Additional details and impacted files

@@           Coverage Diff           @@
##             v2.x    #4471   +/-   ##
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  Coverage        ?   99.75%           
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  Files           ?      180           
  Lines           ?     3249           
  Branches        ?        0           
=======================================
  Hits            ?     3241           
  Misses          ?        8           
  Partials        ?        0           

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[layershifter]

Oops, I haven't mentioned that it targets v2 branch. @mwaddell I will cherry pick commit to master branch.

[mwaddell]

Oops, I haven't mentioned that it targets v2 branch. @mwaddell I will cherry pick commit to master branch.

Thank you @layershifter - I identified the issue in v2.1.5 which is why I targeted that branch - we haven't migrated any of our code to target 3.x yet since it's still in beta.