[MacPorts] #31406: mkvtoolnix: update to 5.0.0

[MacPorts]

#31406: mkvtoolnix: update to 5.0.0
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 Reporter:  Kona8lend@…          |       Owner:  macports-tickets@…                   
     Type:  update               |      Status:  new                                  
 Priority:  Normal               |   Milestone:                                       
Component:  ports                |     Version:  2.0.3                                
 Keywords:  haspatch maintainer  |        Port:  mkvtoolnix                           
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 bump mkvtoolnix 4.9.1 -> 5.0.0

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Ticket URL: <https://trac.macports.org/ticket/31406>
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