update french translation

Author: alexmojaki

core/chapters/c12_dictionaries.py

@@ -450,7 +450,7 @@ class keys_are_iterable2(VerbatimStep):
 
         program_in_text = False
         requirements = (
-            "Run the same code as the previous step, but without `.keys()`. after `quantities`, "
+            "Run the same code as the previous step, but without `.keys()` after `quantities`, "
             "so the middle line is `for key in quantities:`"
         )