Update list of acknowledgments in release notes

current through c3b5992

Author: petere

doc/src/sgml/release-15.sgml

@@ -3671,6 +3671,7 @@ Author: Etsuro Fujita <efujita@postgresql.org>
     <member>Hannu Krosing</member>
     <member>Hans Buschmann</member>
     <member>Hayato Kuroda</member>
+    <member>Heath Lord</member>
     <member>Heikki Linnakangas</member>
     <member>Herwig Goemans</member>
     <member>Himanshu Upadhyaya</member>
@@ -3882,6 +3883,7 @@ Author: Etsuro Fujita <efujita@postgresql.org>
     <member>Takamichi Osumi</member>
     <member>Takayuki Tsunakawa</member>
     <member>Takeshi Ideriha</member>
+    <member>Tatsuhiro Nakamori</member>
     <member>Tatsuhito Kasahara</member>
     <member>Tatsuo Ishii</member>
     <member>Tatsuro Yamada</member>