[MacPorts] #67645: streamlink: update to 6.0.1

[MacPorts]

#67645: streamlink: update to 6.0.1
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  Reporter:  mohd-akram  |      Owner:  (none)
      Type:  update      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  streamlink  |
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Comment (by some1so):

 The current version (1.7.0) has a bug - returning a "410 Client Error"
 when attempting to open youtube or twitch urls.
 This has been reported and resolved in a newer version of streamlink, see
 https://github.com/streamlink/streamlink/issues/3990

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Ticket URL: <https://trac.macports.org/ticket/67645#comment:2>
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