[SAC] [OSGeo] #2761: Upgrade Weblate from 4.11.2 to 4.12.2

[OSGeo]

#2761: Upgrade Weblate from 4.11.2 to 4.12.2
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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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 I plan to upgrade Weblate to 4.12.2 later this weekend.

 https://github.com/WeblateOrg/weblate/releases/tag/weblate-4.12

 key changes, one that strk had asked for

 1) Support for pull requests on gitea
 (Added support for :ref:vcs-gitea)

 other nice new features

 2) Add copy and clone buttons to other translations.
 3) Improved API for creating components from a file (not sure what this
 one is but looks useful)
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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/2761>
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