Update list of acknowledgments in release notes

doc/src/sgml/release-12.sgml

@@ -3519,6 +3519,7 @@ Author: Michael Paquier <michael@paquier.xyz>
     <member>Aleksander Alekseev</member>
     <member>Alex Aktsipetrov</member>
     <member>Alex Kliukin</member>
+    <member>Alex Macy</member>
     <member>Alexander Korotkov</member>
     <member>Alexander Kukushkin</member>
     <member>Alexander Kuzmenkov</member>
@@ -3592,6 +3593,7 @@ Author: Michael Paquier <michael@paquier.xyz>
     <member>Daniel Westermann</member>
     <member>Daniel Wilches</member>
     <member>Darafei Praliaskouski</member>
+    <member>Daryl Waycott</member>
     <member>Dave Cramer</member>
     <member>David Binderman</member>
     <member>David Fetter</member>
@@ -3736,6 +3738,7 @@ Author: Michael Paquier <michael@paquier.xyz>
     <member>Madelaine Thibaut</member>
     <member>Madeleine Thompson</member>
     <member>Magnus Hagander</member>
+    <member>Mahendra Singh</member>
     <member>Mai Peng</member>
     <member>Maksim Milyutin</member>
     <member>Maksym Boguk</member>