refresh the translation files of the engine

(no manual change)
Release 2.4.3

  * User Interface:
    - Add the public branch name to the feedbacks to ease reproducing
      the issues.
  * Engine:
    - #257: loading sessions from git was sometimes loosing DONE marks
    - #267: record a git event when the student reads a tip
    - #265: Provide now the PLM's version number when interacting with the server
  * Pedagogical content: further fixing students' issues
    - #237, #252: typo in French
    - #246, #259: Lessons about mazes': make the templating mechanism explicit
    - #255: IndexOfValue: world and function renamed to match with the instructions
    - #251: Fizz Buzz: correct the solution to match the instructions