fix typo in good example of G-4387

Author: PhilippSalvisberg

docs/4-language-usage/4-control-structures/3-flow-control/g-4387.md

@@ -5,7 +5,7 @@
 
 !!! missing "Unsupported in db\* CODECOP Validators"
     Without access to the Oracle Data Dictionary, we cannot determine the number of rows to be processed.
-    
+
 ## Reason
 
 A `for loop` can hide a `too_many_rows` exception. The more complex a query is, the higher is the risk that more than one row will be processed.
@@ -45,7 +45,7 @@ create or replace package body employee_api is
       select ename
         into l_ename
         from emp
-       where empno >= in_empno;
+       where empno = in_empno;
       return l_ename;
    exception
       when no_data_found then