CREATE PUBLICATION should "See Also" CREATE SUBSCRIPTION

Hi.

I noticed recently that the CREATE PUBLICATION docs page [1] does not
have any "See Also" reference to the CREATE SUBSCRIPTION docs page
[2].

Perhaps it is deliberate (??) but IMO it just seemed like a
strange/annoying omission that there was no easy way to jump both ways
between those two pages.

OTOH, the reverse is OK - the CREATE SUBSCRIPTION docs page *does*
have a "See Also" reference to CREATE PUBLICATION.

Here is a patch:

--- a/doc/src/sgml/ref/create_publication.sgml
+++ b/doc/src/sgml/ref/create_publication.sgml
@@ -333,6 +333,7 @@ CREATE PUBLICATION sales_publication FOR ALL
TABLES IN SCHEMA marketing, sales;
   <simplelist type="inline">
    <member><xref linkend="sql-alterpublication"/></member>
    <member><xref linkend="sql-droppublication"/></member>
+   <member><xref linkend="sql-createsubscription"/></member>
   </simplelist>
  </refsect1>
 </refentry>

------
[1] https://www.postgresql.org/docs/devel/sql-createpublication.html
[2] https://www.postgresql.org/docs/devel/sql-createsubscription.html

Kind Regards,
Peter Smith.
Fujitsu Australia