[SAC] [OSGeo] #2674: Upgrade nextcloud from 20.0.14 to 23

[OSGeo]

#2674: Upgrade nextcloud from 20.0.14 to 23
---------------------------+---------------------------------------
 Reporter:  robe           |       Owner:  strk
     Type:  task           |      Status:  assigned
 Priority:  normal         |   Milestone:  Sysadmin Contract 2022-I
Component:  Systems Admin  |  Resolution:
 Keywords:                 |
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Comment (by strk):

 I'm upgrading to 21, which resulted in this:
 {{{
 Disabled incompatible app: announcementcenter
 Disabled incompatible app: groupfolders
 Disabled incompatible app: impersonate
 Disabled incompatible app: richdocuments
 Disabled incompatible app: spreed
 }}}

 Will report here when completed.
 Is anyone really using the announcement center ? Becuase it's pretty
 spammy with my desktop client...

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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/2674#comment:5>
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