[MacPorts] #68745: grads @2.2.1: Update and new repo

[MacPorts]

#68745: grads @2.2.1: Update and new repo
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 Reporter:  Dave-Allured  |      Owner:  tenomoto
     Type:  update        |     Status:  assigned
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:
 Keywords:                |       Port:  grads
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 The old Cola Grads repo is no longer maintained.  There is a new community
 support repo, maintained by one of the original authors.  There is also a
 new Grads version.

 Please update to https://github.com/j-m-adams/GrADS and Grads version
 2.2.3.

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Ticket URL: <https://trac.macports.org/ticket/68745>
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