[SAC] [OSGeo] #2996: Upgrade nextcloud to 25.0.12

[OSGeo]

#2996: Upgrade nextcloud to 25.0.12
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 Reporter:  robe           |      Owner:  sac@…
     Type:  task           |     Status:  new
 Priority:  normal         |  Milestone:  Sysadmin Contract 2023-I
Component:  Systems Admin  |   Keywords:
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 We are currently at 25.0.8 so a few security critcal patches away
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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/2996>
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