[MacPorts] #48333: nettle: update to 3.1.1

[MacPorts]

#48333: nettle: update to 3.1.1
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  Reporter:  ryandesign@…  |      Owner:  ryandesign@…
      Type:  update        |     Status:  closed
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:  fixed         |   Keywords:
      Port:  nettle        |
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Comment (by ionic@…):

 `vlc-devel` that is... the pure `vlc` port is probably so outdated it
 doesn't even depend on nettle at all.

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Ticket URL: <https://trac.macports.org/ticket/48333#comment:5>
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