[MacPorts] #33685: rabbitmq-server: update to version 2.8.0

[MacPorts]

#33685: rabbitmq-server: update to version 2.8.0
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 Reporter:  steve@…             |       Owner:  macports-tickets@…                   
     Type:  update              |      Status:  new                                  
 Priority:  Normal              |   Milestone:                                       
Component:  ports               |     Version:                                       
 Keywords:  haspatch            |        Port:  rabbitmq-server                      
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Comment(by macsforever2000@…):

 It would be preferable to change the sha1 checksum to sha256 as that is
 now recommended.

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Ticket URL: <https://trac.macports.org/ticket/33685#comment:1>
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