Minor tweak for translation:update command

Author: javiereguiluz

translation.rst

@@ -353,7 +353,7 @@ with these tasks:
 
 .. code-block:: terminal
 
-    # updates the French translation file with the missing strings found in app/Resources/ templates
+    # updates the French translation file with the missing strings found in src/Resources/views/ templates
     $ ./bin/console translation:update --dump-messages --force fr
 
     # updates the English translation file with the missing strings found in AppBundle