[MacPorts] #29521: sbt: update to 0.7.7

[MacPorts]

#29521: sbt: update to 0.7.7
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  Reporter:  flobakk@…          |       Owner:  me@…                  
      Type:  update             |      Status:  closed                
  Priority:  Normal             |   Milestone:                        
 Component:  ports              |     Version:  1.9.2                 
Resolution:  duplicate          |    Keywords:                        
      Port:  sbt                |  
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Comment(by arya.irani@…):

 0.7.7 is a separate but related, discontinued development line,
 incompatible with 0.10.0+.
 There is a separate `sbt-0.7` port which is at 0.7.7

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Ticket URL: <https://trac.macports.org/ticket/29521#comment:3>
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