doc PG 17 relnotes: adjust IN wording

bmomjian · bmomjian · commit 8fea1bd5411b · 2024-05-28T00:21:13.000-04:00
Reported-by: David Rowley Discussion: https://postgr.es/m/CAApHDvqmW0wQRam4paRbHvLQA+w5CJOCno4BCu=NFRLRhYhtRw@mail.gmail.com Backpatch-through: master
diff --git a/doc/src/sgml/release-17.sgml b/doc/src/sgml/release-17.sgml
@@ -467,7 +467,7 @@ Author: Peter Geoghegan <pg@bowt.ie>
 
 <listitem>
 <para>
-Allow btree indexes to more efficiently find a set of values, such as those supplied by IN subqueries (Peter Geoghegan, Matthias van de Meent)
+Allow btree indexes to more efficiently find a set of values, such as those supplied by IN clauses using constants (Peter Geoghegan, Matthias van de Meent)
 </para>
 </listitem>
 
