doc/release-notes: mention security.wrappers changes

nixos/doc/manual/from_md/release-notes/rl-2111.section.xml

@@ -244,6 +244,16 @@
   <section xml:id="sec-release-21.11-incompatibilities">
     <title>Backward Incompatibilities</title>
     <itemizedlist>
+      <listitem>
+        <para>
+          The <literal>security.wrappers</literal> option now requires
+          to always specify an owner, group and whether the
+          setuid/setgid bit should be set. This is motivated by the fact
+          that before NixOS 21.11, specifying either setuid or setgid
+          but not owner/group resulted in wrappers owned by
+          nobody/nogroup, which is unsafe.
+        </para>
+      </listitem>
       <listitem>
         <para>
           The <literal>paperless</literal> module and package have been

nixos/doc/manual/release-notes/rl-2111.section.md

@@ -75,6 +75,8 @@ subsonic-compatible api. Available as [navidrome](#opt-services.navidrome.enable
 
 ## Backward Incompatibilities {#sec-release-21.11-incompatibilities}
 
+- The `security.wrappers` option now requires to always specify an owner, group and whether the setuid/setgid bit should be set.
+  This is motivated by the fact that before NixOS 21.11, specifying either setuid or setgid but not owner/group resulted in wrappers owned by nobody/nogroup, which is unsafe.
 
 - The `paperless` module and package have been removed. All users should migrate to the
   successor `paperless-ng` instead. The Paperless project [has been