Whats the syntax to change the performance level (SLO) of a SQL Azure database?

The MSDN page

states

-- Azure SQL Database Syntax
ALTER DATABASE database_name 
{
    MODIFY NAME =new_database_name
  | MODIFY ( <edition_options> [, ... n] ) 
  | COLLATE collation_name
  | SET { <set_database_options> } 
}

<edition_options> ::= 
{
      MAXSIZE = { 100 MB | 500 MB |1 | 5 | 10 | 20 | 30 … 150 … 500 } GB  
    | EDITION = { 'web' | 'business' | 'basic' | 'standard' | 'Premium' } 
    | SERVICE_OBJECTIVE = { 'shared' | 'basic' | 'S0' | 'S1' | 'S2' | 'P1' | 'P2' | 'P3' } 
}

<set_database_options> ::= 
    <db_update_option>
<db_update_option> ::= 
    { READ_ONLY | READ_WRITE }
 [;]

I tried the following, however they are all failing with syntax errors

ALTER DATABASE SCRATCH1 
{
MODIFY (EDITION = 'STANDARD' , SERVICE_OBJECTIVE = 'S0')
};

ALTER DATABASE SCRATCH1 
{
MODIFY (EDITION = 'STANDARD' | SERVICE_OBJECTIVE = 'S0')
};

ALTER DATABASE SCRATCH1 
MODIFY (EDITION = 'STANDARD' , SERVICE_OBJECTIVE = 'S0');

ALTER DATABASE SCRATCH1 
MODIFY (EDITION = 'STANDARD' | SERVICE_OBJECTIVE = 'S0');

Clearly I'm misinterpreting the MSDN doc, so, what is the correct syntax?