[MacPorts] #48847: nghttp2 @1.3.0_0: update to version 1.3.1

[MacPorts]

#48847: nghttp2 @1.3.0_0: update to version 1.3.1
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  Reporter:  mschamschula@…  |      Owner:  macports-tickets@…
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.3.3
Resolution:                  |   Keywords:  haspatch maintainer
      Port:  nghttp2         |
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Comment (by mschamschula@…):

 P.S.: I also made changes (by adding PythonBranch) to make use of
 PythonVersion more consistent.

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Ticket URL: <https://trac.macports.org/ticket/48847#comment:1>
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