Tema 2.start-here. Reword test description

Since the word test can have a very specific meaning, it may be
better to reword this test description. Also, the presence of two
"can" may read a bit repetitive.

Author: octopusinvitro

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

@@ -255,7 +255,7 @@ describe('Entities library', function () {
       expect(health.effect).toEqual(jasmine.any(Effect));
     });
 
-    xit('can test if a character can pay its cost.', function () {
+    xit('knows if a character can pay its cost.', function () {
       var health = new Scroll('health', 5, new Effect({ hp: 5 }));
       expect(health.canBeUsed(10)).toBe(true);
       expect(health.canBeUsed(4)).toBe(false);