fix FR translation announcement

Summary

The FR translation for announcement_end should be jusqu'au instead of jusqu'a

Steps to reproduce

Start a ProdManager server with the PM_LANG=fr env var
Create an announcement

Environment info

0.20.0

Possible fixes

https://gitlab.com/prod-manager/prod-manager/-/blob/master/ProdManager/helpers/lang/translations/fr.yml#L131

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information