doc: update "relam" description in pg_class catalog reference

[Ian Barwick]

Hi

Here:

  https://www.postgresql.org/docs/devel/catalog-pg-class.html

the description for "relam" has not been updated to take into account
table access methods; patch attached.


Regards

Ian Barwick

--
 Ian Barwick                   https://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

diff --git a/doc/src/sgml/catalogs.sgml b/doc/src/sgml/catalogs.sgml
new file mode 100644
index 1300c7b..df68cf7
*** a/doc/src/sgml/catalogs.sgml
--- b/doc/src/sgml/catalogs.sgml
*************** SCRAM-SHA-256$<replaceable>&lt;iteration
*** 1730,1736 ****
        <entry><structfield>relam</structfield></entry>
        <entry><type>oid</type></entry>
        <entry><literal><link linkend="catalog-pg-am"><structname>pg_am</structname></link>.oid</literal></entry>
!       <entry>If this is an index, the access method used (B-tree, hash, etc.)</entry>
       </row>
  
       <row>
--- 1730,1736 ----
        <entry><structfield>relam</structfield></entry>
        <entry><type>oid</type></entry>
        <entry><literal><link linkend="catalog-pg-am"><structname>pg_am</structname></link>.oid</literal></entry>
!       <entry>If this is table or an index, the access method used (heap, B-tree, hash, etc.)</entry>
       </row>
  
       <row>