Doc: fix erroneous example.

The grammar requires these options to appear the other way 'round.

jotpe@posteo.de

Discussion: https://postgr.es/m/78933bd0-45ce-690e-b832-a328dd1a5567@posteo.de

doc/src/sgml/ddl.sgml

@@ -3095,8 +3095,8 @@ CREATE TABLE measurement_y2007m12 PARTITION OF measurement
 
 CREATE TABLE measurement_y2008m01 PARTITION OF measurement
     FOR VALUES FROM ('2008-01-01') TO ('2008-02-01')
-    TABLESPACE fasttablespace
-    WITH (parallel_workers = 4);
+    WITH (parallel_workers = 4)
+    TABLESPACE fasttablespace;
 </programlisting>
       </para>