[MacPorts] #68453: gcc10-bootstrap: update to gcc 10.5

[MacPorts]

#68453: gcc10-bootstrap: update to gcc 10.5
------------------------------+----------------------
  Reporter:  barracuda156     |      Owner:  catap
      Type:  update           |     Status:  assigned
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.8.1
Resolution:                   |   Keywords:
      Port:  gcc10-bootstrap  |
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Comment (by barracuda156):

 Replying to [comment:2 kencu]:
 > IMHO, there's no good reason for someone to spend the time to try to
 make gcc10-bootstrap build on Sonoma, even if with sufficient efforts such
 a thing might be possible.

 Bypass all mad zoo of clangs, for example :)

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Ticket URL: <https://trac.macports.org/ticket/68453#comment:4>
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