Upgrade weblate to 4.11.1

[robe]

There look to be quite a few useful updates in weblate 4.11.

We are currently running 4.10.

New changes are listed in ​https://docs.weblate.org/en/latest/changes.html#weblate-4-11

Ones that look possibly useful to us:

Added support for defining custom teams at project level to grant users access, see Managing per-project access control.

Fixed updating PO files with obsolete strings or missing plurals.

Fixed string state tracking when the strings changes in the repository.

2 CVEEs involving GIT

[robe]

Done