nixos/doc/manual/release-notes/rl-2111: Nix 2.4

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

@@ -15,6 +15,15 @@
   <section xml:id="sec-release-21.11-highlights">
     <title>Highlights</title>
     <itemizedlist>
+      <listitem>
+        <para>
+          Nix has been updated to version 2.4, reference its
+          <link xlink:href="https://discourse.nixos.org/t/nix-2-4-released/15822">release
+          notes</link> for more information on what has changed. The
+          previous version of Nix, 2.3.16, remains available for the
+          time being in the <literal>nix_2_3</literal> package.
+        </para>
+      </listitem>
       <listitem>
         <para>
           <literal>iptables</literal> now uses

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

@@ -6,6 +6,8 @@ In addition to numerous new and upgraded packages, this release has the followin
 
 ## Highlights {#sec-release-21.11-highlights}
 
+- Nix has been updated to version 2.4, reference its [release notes](https://discourse.nixos.org/t/nix-2-4-released/15822) for more information on what has changed. The previous version of Nix, 2.3.16, remains available for the time being in the `nix_2_3` package.
+
 - `iptables` now uses `nf_tables` backend.
 
 - PHP now defaults to PHP 8.0, updated from 7.4.