BAEL-2804 JPA Query Parameters Usage

Fix givenEmpNumber_whenUsingPositionalParameter_thenReturnExpectedEmployee
test case after adjustemnts.

persistence-modules/java-jpa/src/test/java/com/baeldung/jpa/queryparams/JPAQueryParamsUnitTest.java

@@ -37,7 +37,7 @@ public class JPAQueryParamsUnitTest {
 		TypedQuery<Employee> query = entityManager.createQuery(
 		        "SELECT e FROM Employee e WHERE e.empNumber = ?1" , Employee.class);
 		String empNumber = "A123";
-		Employee employee = query.setParameter(0, empNumber).getSingleResult();
+		Employee employee = query.setParameter(1, empNumber).getSingleResult();
         Assert.assertNotNull("Employee not found", employee);
     }