[MacPorts] #61429: Add macOS 11 Big Sur GitHub Actions

[MacPorts]

#61429: Add macOS 11 Big Sur GitHub Actions
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  Reporter:  ryandesign      |      Owner:  admin@…
      Type:  enhancement     |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  server/hosting  |    Version:
Resolution:                  |   Keywords:
      Port:                  |
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Comment (by chrstphrchvz):

 PR opened: https://github.com/macports/macports-ports/pull/9323

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Ticket URL: <https://trac.macports.org/ticket/61429#comment:1>
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