[MacPorts] #46886: gradle: update to 2.3

[MacPorts]

#46886: gradle: update to 2.3
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 Reporter:  rockettj@…  |      Owner:  macports-tickets@…
     Type:  update      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.3.3
 Keywords:              |       Port:  gradle
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 Also added a livecheck

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Ticket URL: <https://trac.macports.org/ticket/46886>
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