[Conference-resources] [OSGeo] #3392: update pretalx to newer version

[OSGeo]

#3392: update pretalx to newer version
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 Reporter:  astrid_emde  |       Owner:  conference-resources@…
     Type:  task         |      Status:  new
 Priority:  normal       |   Milestone:  Unplanned
Component:  Pretalx      |  Resolution:
 Keywords:  pretalx      |
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Changes (by robe):

 * component:  SysAdmin => Pretalx
 * owner:  sac-tickets@… => conference-resources@…

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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/3392#comment:6>
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