[MacPorts] #69736: libmamba: Update to 1.5.8

[MacPorts]

#69736: libmamba: Update to 1.5.8
------------------------+----------------------
 Reporter:  ryandesign  |      Owner:  l2dy
     Type:  update      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:              |       Port:  libmamba
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 libmamba was last updated 18 months ago and should probably be updated to
 the latest stable release.

 https://github.com/mamba-org/mamba/releases/latest

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Ticket URL: <https://trac.macports.org/ticket/69736>
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