fixed the error description and test description

Author: alizada-dev

Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js

@@ -36,7 +36,7 @@ function getCardValue(card) {
       return Number(rankPart);
     }
   } else {
-    throw new Error("Error"); 
+    throw new Error("Invalid card. A valid card should contain a rank followed by the suit"); 
   }
 }
 

Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js

@@ -19,7 +19,7 @@ test(`Should return 11 when given an ace card`, () => {
 // https://jestjs.io/docs/expect#tothrowerror
 
 // Number Cards (2-10)
-test(`should return the number (numeric value)`, () => {
+test(`should return the numeric value of number cards`, () => {
   expect(getCardValue("2♠")).toEqual(2);
   expect(getCardValue("10♥")).toEqual(10);
   expect(getCardValue("9♦")).toEqual(9);