Tema 2.start-here. Correct the maxHp expectation

According to the guide, it's default value is zero instead of 15.

Author: octopusinvitro

es/02-javascript/02-practica/start-here/spec/entities.js

@@ -84,7 +84,7 @@ describe('Entities library', function () {
       expect(character.mp).toBe(0);
       expect(character.hp).toBe(0);
       expect(character.maxMp).toBe(0);
-      expect(character.maxHp).toBe(15);
+      expect(character.maxHp).toBe(0);
     });
 
     it('allows to create characters with specific features.', function () {