[MacPorts] #69668: Use newer Xcode on macOS 14 GitHub Actions runner

[MacPorts]

#69668: Use newer Xcode on macOS 14 GitHub Actions runner
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  Reporter:  ryandesign      |      Owner:  admin@…
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  server/hosting  |    Version:
Resolution:                  |   Keywords:
      Port:                  |
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Comment (by jmroot):

 Hm, strange that they default to such an old version then. Yes, I'm sure
 we can run xcode-select.

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Ticket URL: <https://trac.macports.org/ticket/69668#comment:3>
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