[MacPorts] #70584: zig: Update to 0.13.0

[MacPorts]

#70584: zig: Update to 0.13.0
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  Reporter:  sugarthc  |      Owner:  (none)
      Type:  update    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  zig       |
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Comment (by sugarthc):

 I've created a [https://github.com/macports/macports-ports/pull/25517 new
 PR]

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Ticket URL: <https://trac.macports.org/ticket/70584#comment:5>
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