doc PG 17 relnotes: wording fix

Reported-by: Pantelis Theodosiou

Discussion: https://postgr.es/m/CAE3TBxxvkSGJGv7S0SMLSAe0khrQJBHsTca799r=vDJTn+BDAw@mail.gmail.com

Backpatch-through: master

doc/src/sgml/release-17.sgml

@@ -385,7 +385,7 @@ Author: Tom Lane <tgl@sss.pgh.pa.us>
 
 <listitem>
 <para>
-Allow query nodes to be run in parallel in more case (Tom Lane)
+Allow query nodes to be run in parallel in more cases (Tom Lane)
 </para>
 </listitem>
 
@@ -563,6 +563,17 @@ Improve performance of heavily-contended WAL writes (Bharath Rupireddy)
 </para>
 </listitem>
 
+<!--
+Author: David Rowley <drowley@postgresql.org>
+2024-04-07 [c4ab7da60] Avoid needless large memcpys in libpq socket writing
+-->
+
+<listitem>
+<para>
+Improve performance when transferring large blocks of data to a client (Melih Mutlu)
+</para>
+</listitem>
+
 <!--
 Author: Thomas Munro <tmunro@postgresql.org>
 2024-04-03 [210622c60] Provide vectored variant of ReadBuffer().
@@ -1923,17 +1934,6 @@ Add libpq function PQsetChunkedRowsMode to allow retrieval of results in chunks
 </para>
 </listitem>
 
-<!--
-Author: David Rowley <drowley@postgresql.org>
-2024-04-07 [c4ab7da60] Avoid needless large memcpys in libpq socket writing
--->
-
-<listitem>
-<para>
-Allow libpq to more efficiently transfer large blocks of data (Melih Mutlu)
-</para>
-</listitem>
-
 <!--
 Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
 2024-04-08 [d39a49c1e] Support TLS handshake directly without SSLRequest negoti