iluwatar#984 update Builder readme

Author: iluwatar

builder/README.md

@@ -110,7 +110,7 @@ And then we have the builder
 And then it can be used as:
 
 ```java
-Hero mage = new Hero.Builder(Profession.MAGE, "Riobard").withHairColor(HairColor.BLACK).withWeapon(Weapon.DAGGER).build();
+var mage = new Hero.Builder(Profession.MAGE, "Riobard").withHairColor(HairColor.BLACK).withWeapon(Weapon.DAGGER).build();
 ```
 
 ## Applicability