[MacPorts] #62165: graphviz: Update to 2.46.0

[MacPorts]

#62165: graphviz: Update to 2.46.0
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  Reporter:  jarrodmillman             |      Owner:  ryandesign
      Type:  update                    |     Status:  accepted
  Priority:  Normal                    |  Milestone:
 Component:  ports                     |    Version:
Resolution:                            |   Keywords:
      Port:  graphviz, graphviz-devel  |
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Comment (by jarrodmillman):

 The current stable release is 2.46.1 now:
 https://gitlab.com/graphviz/graphviz/-/blob/master/CHANGELOG.md#2461-2021-02-13

 It does mention a gvedit fix, but I don't know if it is related to the
 issue you are seeing:
 https://gitlab.com/graphviz/graphviz/-/issues/1862

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Ticket URL: <https://trac.macports.org/ticket/62165#comment:8>
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