[SAC] [OSGeo] #2662: Upgrade nextcloud from 19.0.13 to 20.0.13

[OSGeo]

#2662: Upgrade nextcloud from 19.0.13 to 20.0.13
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 Reporter:  robe           |      Owner:  sac@…
     Type:  task           |     Status:  new
 Priority:  normal         |  Milestone:  Sysadmin Contract 2021-II
Component:  Systems Admin  |   Keywords:
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 Upgrading nextcloud to current stable.  19 is close to EOL.
 I've tested on dev so will do on prod.

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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/2662>
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