[MacPorts] #68364: rust: Update to 1.73.0 (was: rust 1.7.3.0)

[MacPorts]

#68364: rust: Update to 1.73.0
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  Reporter:  Schamschula  |      Owner:  MarcusCalhoun-Lopez
      Type:  update       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.8.1
Resolution:               |   Keywords:
      Port:  rust         |
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Ticket URL: <https://trac.macports.org/ticket/68364#comment:7>
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