[MacPorts] #56296: update pdb2pqr to 2.1.1 release

[MacPorts]

#56296: update pdb2pqr to 2.1.1 release
-----------------------+---------------------
 Reporter:  jwhowarth  |      Owner:  (none)
     Type:  update     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:
 Keywords:  science    |       Port:  pdb2pqr
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 The attached Portfile diff updates the pdb2pqr package to the latest
 upstream 2.1.1 release.

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Ticket URL: <https://trac.macports.org/ticket/56296>
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