[SAC] [OSGeo] #2979: Upgrade weblate to 5.0

[OSGeo]

#2979: Upgrade weblate to 5.0
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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 running 4.16.4  which is two minors behind.
 At a glance there doesn't seem to be any breaking changes we should be
 concerned about.
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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/2979>
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