nixos/soju: add 21.11 release notes entry

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

@@ -207,6 +207,13 @@
           <link linkend="opt-services.postfixadmin.enable">postfixadmin</link>.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          <link xlink:href="https://sr.ht/~emersion/soju">soju</link>, a
+          user-friendly IRC bouncer. Available as
+          <link xlink:href="options.html#opt-services.soju.enable">services.soju</link>.
+        </para>
+      </listitem>
     </itemizedlist>
   </section>
   <section xml:id="sec-release-21.11-incompatibilities">

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

@@ -62,6 +62,8 @@ subsonic-compatible api. Available as [navidrome](#opt-services.navidrome.enable
 
 - [postfixadmin](https://postfixadmin.sourceforge.io/), a web based virtual user administration interface for Postfix mail servers. Available as [postfixadmin](#opt-services.postfixadmin.enable).
 
+- [soju](https://sr.ht/~emersion/soju), a user-friendly IRC bouncer. Available as [services.soju](options.html#opt-services.soju.enable).
+
 ## Backward Incompatibilities {#sec-release-21.11-incompatibilities}