doc PG 18 relnotes: update description of skip scan item

Reported-by: Peter Geoghegan
Discussion: https://postgr.es/m/CAH2-Wz=5aGnkPsLH9u1kZED=M8TKvxX2b9XmgdOe+ePO0KxwcQ@mail.gmail.com

Backpatch-through: 18 only

diff --git a/doc/src/sgml/release-18.sgml b/doc/src/sgml/release-18.sgml
index 75cf99b6390ab6e7fd0ab57c28ada943a37f9027..63ce3473dc58bbb7223f0fc0cb07d06ba8fc6fd5 100644 (file)
--- a/doc/src/sgml/release-18.sgml
+++ b/doc/src/sgml/release-18.sgml
@@ -607,8 +607,10 @@ Author: Peter Geoghegan <pg@bowt.ie>
       </para>
 
       <para>
-      This allows multi-column btree indexes to be used by queries that
-      only equality-reference the second or later indexed columns.
+      This allows multi-column btree indexes to be used in more cases such
+      as when there are no restrictions on the first or early indexed
+      columns (or there are non-equality ones), and there are useful
+      restrictions on later indexed columns.
       </para>
       </listitem>