[MacPorts] #69939: audacity: update to 3.5.1

[MacPorts]

#69939: audacity: update to 3.5.1
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  Reporter:  mohd-akram  |      Owner:  RJVB
      Type:  update      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  audacity    |
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Comment (by RJVB):

 I seem to recall dropping maintainership of this port after my previous
 efforts at updating it were shot down. That was a substantial PR with the
 creation of at least 1 port for legacy versions on older OS X versions;
 I'm not interested in trying to dance that dance again.

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Ticket URL: <https://trac.macports.org/ticket/69939#comment:2>
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