Doc: B-Tree only has one additional parameter.

petergeoghegan · petergeoghegan · commit 3f0daeb02f8d · 2021-03-10T22:10:36.000-08:00
Oversight in commit 9f3665f. Backpatch: 13-, just like commit 9f3665f.
diff --git a/doc/src/sgml/ref/create_index.sgml b/doc/src/sgml/ref/create_index.sgml
@@ -425,7 +425,7 @@ CREATE [ UNIQUE ] INDEX [ CONCURRENTLY ] [ [ IF NOT EXISTS ] <replaceable class=
    </variablelist>
 
    <para>
-    B-tree indexes also accept these parameters:
+    B-tree indexes additionally accept this parameter:
    </para>
 
    <variablelist>
