[MacPorts] #51568: shellcheck @0.3.8: update to 0.4.6

[MacPorts]

#51568: shellcheck @0.3.8: update to 0.4.6
-------------------------+------------------------
  Reporter:  sierkb@…    |      Owner:  neverpanic
      Type:  update      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  shellcheck  |
-------------------------+------------------------

Comment (by favadi):

 I create a PR for this ticket: https://github.com/macports/macports-
 ports/pull/693.

--
Ticket URL: <https://trac.macports.org/ticket/51568#comment:5>
MacPorts <https://www.macports.org/>
Ports system for macOS