[MacPorts] #69343: yaml-cpp: Update to 0.8.0

[MacPorts]

#69343: yaml-cpp: Update to 0.8.0
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  Reporter:  DanielO   |      Owner:  judaew
      Type:  update    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  haspatch
      Port:  yaml-cpp  |
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Comment (by judaew):

 The `yaml-cpp` project changed their tag naming strategy broke livecheck.
 So I didn't know there was a new version. Thank you for informing!

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Ticket URL: <https://trac.macports.org/ticket/69343#comment:3>
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