release-notes: add an entry for users.motdFile

nixos/doc/manual/from_md/release-notes/rl-2305.section.xml

@@ -221,6 +221,13 @@
           <link xlink:href="https://search.nixos.org/packages?channel=unstable&amp;show=utm&amp;from=0&amp;size=1&amp;sort=relevance&amp;type=packages&amp;query=utm">package</link>.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          The new option <literal>users.motdFile</literal> allows
+          configuring a Message Of The Day that can be updated
+          dynamically.
+        </para>
+      </listitem>
       <listitem>
         <para>
           Resilio sync secret keys can now be provided using a secrets

nixos/doc/manual/release-notes/rl-2305.section.md

@@ -66,6 +66,8 @@ In addition to numerous new and upgraded packages, this release has the followin
 
 - A new `virtualisation.rosetta` module was added to allow running `x86_64` binaries through [Rosetta](https://developer.apple.com/documentation/apple-silicon/about-the-rosetta-translation-environment) inside virtualised NixOS guests on Apple silicon. This feature works by default with the [UTM](https://docs.getutm.app/) virtualisation [package](https://search.nixos.org/packages?channel=unstable&show=utm&from=0&size=1&sort=relevance&type=packages&query=utm).
 
+- The new option `users.motdFile` allows configuring a Message Of The Day that can be updated dynamically.
+
 - Resilio sync secret keys can now be provided using a secrets file at runtime, preventing these secrets from ending up in the Nix store.
 
 - The `services.fwupd` module now allows arbitrary daemon settings to be configured in a structured manner ([`services.fwupd.daemonSettings`](#opt-services.fwupd.daemonSettings)).