[1.0.0] Cannon shell damage wrong translation in french

[frayien]

The current translation for "Cannon shell damage: " in french is "Dégâts des obus d'artillerie : ", which means "Artillery shell damage: ".
I proposed a correction : "Dégâts des obus : ".
(It is consistent with other places where cannon shells are referred)

https://crowdin.com/translate/factorio/ ... ell%20dama

I need people to review and approve it if we want to definitively fix it !
Thank you all for helping improving this game !