[MacPorts] #60140: alpine @2.21: update URL

[MacPorts]

#60140: alpine @2.21: update URL
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 Reporter:  FranklinYu   |      Owner:  jcvernaleo
     Type:  enhancement  |     Status:  assigned
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  alpine
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 Alpine has been migrated to new sites.

 - homepage: http://alpine.x10host.com
 - source code: https://repo.or.cz/alpine.git

 Not sure how long the homepage would last for, but repo.or.cz is pretty
 stable. Hopefully John no longer need to maintain his own site for hosting
 Alpine tarballs.

 By the way 2.22 is available.

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Ticket URL: <https://trac.macports.org/ticket/60140>
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