[MacPorts] #60957: scons: Update to version 4.0.1

[MacPorts]

#60957: scons: Update to version 4.0.1
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  Reporter:  mf2k    |      Owner:  ryandesign
      Type:  update  |     Status:  accepted
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  scons   |
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Comment (by herbygillot):

 Does it make sense to have a separate `scons4` package which conflicts
 with `scons`, but builds against Python 3.8? Then you could take your time
 targeting dependent software... clunky solution, but wondering how to not
 have to do things in a "Big Bang" way, being forced to change every
 affected port at the same time.

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Ticket URL: <https://trac.macports.org/ticket/60957#comment:4>
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