rename input parameter to match our naming conventions

Author: PhilippSalvisberg

docs/4-language-usage/7-stored-objects/9-sql-macros/g-7910.md

@@ -17,15 +17,15 @@ Logging macro calls via a call to a procedure that does DML in an autonomous tra
 
 ``` sql
 create or replace function row_generator(
-   num_rows_in in number
+   in_num_rows in number
 )
    return varchar2 sql_macro as
 begin
    insert into function_calls(name,called_at,parameter_value)
-   values ($$plsql_unit,current_timestamp,num_rows_in);
+   values ($$plsql_unit,current_timestamp,in_num_rows);
    commit;
 
-   return 'select level as row_sequence from dual connect by level <= num_rows_in';
+   return 'select level as row_sequence from dual connect by level <= in_num_rows';
 end row_generator;
 /
 ```
@@ -34,11 +34,11 @@ end row_generator;
 
 ``` sql
 create or replace function row_generator(
-   num_rows_in in number
+   in_num_rows in number
 )
    return varchar2 sql_macro as
 begin
-   return 'select level as row_sequence from dual connect by level <= num_rows_in';
+   return 'select level as row_sequence from dual connect by level <= in_num_rows';
 end row_generator;
 /
 ```