Update French translation for MSG_BED_CORRECTION_MENU by @carlin57

lang/lang_en_fr.txt

@@ -108,7 +108,7 @@
 
 #MSG_BED_CORRECTION_MENU c=18
 "Bed level correct"
-"Chg niveau plateau"
+"Reglage plateau"
 
 #MSG_BELTTEST c=18
 "Belt test        "