[MacPorts] #71972: qt5: Update to last stable 5.15.16.

[MacPorts]

#71972: qt5: Update to last stable 5.15.16.
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  Reporter:  cgilles  |      Owner:  MarcusCalhoun-Lopez
      Type:  update   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  qt5      |
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Comment (by cgilles):

 Hi Marcus,

 If you have time please update the last Qt 5.15 version. It will become in
 EOL but Qt5 is the best to support older MacOS version under Intel
 computer. In digiKam will provide a Qt5 Intel version with this package
 (Arm version is compiled with Qt 6.8).

 Thanks in advance

 Gilles Caulier

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Ticket URL: <https://trac.macports.org/ticket/71972#comment:2>
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