fix findItemEntry methods to use a single contains

Author: lucasfcosta

chapter8/2_best_practices_for_end_to_end_tests/1_page_objects/cypress/pageObjects/inventoryManagement.js

@@ -28,7 +28,7 @@ export class InventoryManagement {
   }
 
   static findItemEntry(itemName, quantity) {
-    return cy.get("li").contains(`${itemName} - Quantity: ${quantity}`);
+    return cy.contains("li", `${itemName} - Quantity: ${quantity}`);
   }
 
   static undo() {

chapter8/2_best_practices_for_end_to_end_tests/2_application_actions/cypress/pageObjects/inventoryManagement.js

@@ -28,7 +28,7 @@ export class InventoryManagement {
   }
 
   static findItemEntry(itemName, quantity) {
-    return cy.get("li").contains(`${itemName} - Quantity: ${quantity}`);
+    return cy.contains("li", `${itemName} - Quantity: ${quantity}`);
   }
 
   static undo() {

chapter8/3_dealing_with_flakiness/1_avoiding_waiting_for_fixed_amounts_of_time/cypress/pageObjects/inventoryManagement.js

@@ -28,7 +28,7 @@ export class InventoryManagement {
   }
 
   static findItemEntry(itemName, quantity) {
-    return cy.get("li").contains(`${itemName} - Quantity: ${quantity}`);
+    return cy.contains("li", `${itemName} - Quantity: ${quantity}`);
   }
 
   static undo() {

chapter8/3_dealing_with_flakiness/2_stubbing_uncontrollable_factors/cypress/pageObjects/inventoryManagement.js

@@ -28,7 +28,7 @@ export class InventoryManagement {
   }
 
   static findItemEntry(itemName, quantity) {
-    return cy.get("li").contains(`${itemName} - Quantity: ${quantity}`);
+    return cy.contains("li", `${itemName} - Quantity: ${quantity}`);
   }
 
   static undo() {