[SAC] [OSGeo] #2740: Pretalx updates

[OSGeo]

#2740: Pretalx updates
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 Reporter:  lucadelu       |       Owner:  sac@…
     Type:  task           |      Status:  new
 Priority:  major          |   Milestone:  Sysadmin Contract 2022-II
Component:  Systems Admin  |  Resolution:
 Keywords:  pretalx        |
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Comment (by robe):

 I started up https://talks.staging.osgeo.org

 and upgraded the pretalx (main to latest pretalx docker image) and applied
 latest main branch of public-voting and pages. I didn't restore data from
 production since I didn't want any unintentional emails going out.
 Hopefully this is good enough for you to test.  If it looks good to you I
 can install the same image on production.

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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/2740#comment:2>
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