Doc fix: New York State's capital is Albany.

The inheritance example in the manual implies that the capital of New York
is New York City, but in reality it's Albany.

George Hartzell

doc/src/sgml/ddl.sgml

@@ -2136,7 +2136,7 @@ WHERE c.altitude > 500 AND c.tableoid = p.oid;
    following <command>INSERT</command> statement will fail:
 <programlisting>
 INSERT INTO cities (name, population, altitude, state)
-VALUES ('New York', NULL, NULL, 'NY');
+VALUES ('Albany', NULL, NULL, 'NY');
 </programlisting>
    We might hope that the data would somehow be routed to the
    <structname>capitals</structname> table, but this does not happen: