[MacPorts] #69409: dot2tex: use python 3.12 instead of 3.11

[MacPorts]

#69409: dot2tex: use python 3.12 instead of 3.11
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 Reporter:  jowens       |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  dot2tex
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 dot2tex currently requires a python.default_version of 311. Could we move
 to python 3.12, consistent with the move of Macports to 3.12 on 1 Jan
 2024?

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Ticket URL: <https://trac.macports.org/ticket/69409>
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