add missing into_clause in G-8310 examples

Author: PhilippSalvisberg

docs/4-language-usage/8-patterns/3-validating-input-parameter-size/g-8310.md

@@ -20,6 +20,7 @@ create or replace package body department_api is
       end if;
       -- get the department by name
       select *
+        into l_return
         from departments
        where department_name = in_dept_name;
 
@@ -40,6 +41,7 @@ create or replace package body department_api is
    begin
       -- get the department by name
       select *
+        into l_return
         from departments
        where department_name = l_dept_name;