[MacPorts] #44045: saga: fix livecheck

[MacPorts]

#44045: saga: fix livecheck
---------------------+---------------------
 Reporter:  mojca@…  |      Owner:  vince@…
     Type:  defect   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:
 Keywords:           |       Port:  saga
---------------------+---------------------
 Please fix the livecheck in the `saga` port.

 {{{
 $ port -v livecheck
 Error: cannot check if saga was updated (Could not resolve host:
 sourceforge; nodename nor servname provided, or not known)
 }}}

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Ticket URL: <https://trac.macports.org/ticket/44045>
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