[MacPorts] #69580: keepassxc: update to 2.7.7

[MacPorts]

#69580: keepassxc: update to 2.7.7
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  Reporter:  contextnerror  |      Owner:  (none)
      Type:  update         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:
Resolution:                 |   Keywords:
      Port:  KeePassXC      |
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Comment (by contextnerror):

 I've looked at the failures again, and it appears that the constant
 between them is this error:\\
 `error: no matching constructor for initialization of
 'std::shared_ptr<unsigned char []>'`\\
 which happens around the point of BrowserMessageBuilder.cpp

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Ticket URL: <https://trac.macports.org/ticket/69580#comment:3>
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