[MacPorts] #51568: Update ShellCheck

[MacPorts]

#51568: Update ShellCheck
----------------------+--------------------------------
 Reporter:  sierkb@…  |      Owner:  macports-tickets@…
     Type:  update    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:  2.3.4
 Keywords:            |       Port:  shellcheck
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 Update shellcheck port to the latest upstream release version which is
 0.4.4.

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Ticket URL: <https://trac.macports.org/ticket/51568>
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