fixes #115 - syntax error in good and bad example

Author: PhilippSalvisberg

docs/4-language-usage/9-function-usage/g-9010.md

@@ -13,7 +13,7 @@ Using an explicit format model for string to `date` or `timestamp` conversion av
 
 ``` sql
 create package body employee_api is
-   procedure set_dob (in_employee_id in employees.employee_id%type, in_dob_str in varchar2)
+   procedure set_dob (in_employee_id in employees.employee_id%type, in_dob_str in varchar2) is
    begin
       update employee
       set date_of_birth = to_date(in_dob_str)
@@ -27,7 +27,7 @@ end employee_api;
 
 ``` sql
 create package body employee_api is
-   procedure set_dob (in_employee_id in employees.employee_id%type, in_dob_str in varchar2)
+   procedure set_dob (in_employee_id in employees.employee_id%type, in_dob_str in varchar2) is
    begin
       update employee
       set date_of_birth = to_date(in_dob_str, 'YYYY-MM-DD')