Upgrade Weblate from 4.11.2 to 4.12.2

[robe]

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)

[robe]

Going to start the upgrade process shortly, so there will be a little bit of downtime during the upgrade.

[robe]

I upgraded but sadly couldn't get the gitea pull request feature to work. it shows but errors. I might need to configure the url somewhere.