[MacPorts] #59429: ocaml: Update to 4.12.0 and fix livecheck

[MacPorts]

#59429: ocaml: Update to 4.12.0 and fix livecheck
-------------------------+----------------------
  Reporter:  ryandesign  |      Owner:  pmetzger
      Type:  update      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:  fixed       |   Keywords:
      Port:  ocaml       |
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Changes (by pmetzger):

 * status:  assigned => closed
 * resolution:   => fixed


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Ticket URL: <https://trac.macports.org/ticket/59429#comment:15>
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