feat: adds getBusinessName getter

within the BusinessCheckingAccount.java

Author: AmiyahJo

lesson_17/bank/bank_app/src/main/java/com/codedifferently/lesson17/bank/BusinessCheckingAccount.java

@@ -22,4 +22,8 @@ public BusinessCheckingAccount(String accountNumber, Set<Customer> owners, Strin
         }
         this.businessName = businessName;
     }   
+
+    public String getBusinessName() {
+        return businessName;
+    }
 }