Update solution.md

Change "so to say" to "so to speak".

Author: paroche

1-js/08-prototypes/02-function-prototype/4-new-object-same-constructor/solution.md

@@ -15,7 +15,7 @@ alert( user2.name ); // Pete (worked!)
 
 It worked, because `User.prototype.constructor == User`.
 
-..But if someone, so to say, overwrites `User.prototype` and forgets to recreate `"constructor"`, then it would fail.
+..But if someone, so to speak, overwrites `User.prototype` and forgets to recreate `"constructor"`, then it would fail.
 
 For instance: