[SAC] [OSGeo] #2779: Upgrade weblate to 4.13.1

[OSGeo]

#2779: Upgrade weblate to 4.13.1
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 Reporter:  robe           |      Owner:  sac@…
     Type:  task           |     Status:  new
 Priority:  normal         |  Milestone:  Sysadmin Contract 2022-II
Component:  Systems Admin  |   Keywords:
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 We are currently running 4.12.1.  There have been a couple of bugs fixed
 since, but no new features that would affect or impact us.
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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/2779>
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