doc/release-notes: highlight pulseaudio upgrade with new bluetooth codecs

nixos/doc/manual/from_md/release-notes/rl-2205.section.xml

@@ -74,6 +74,10 @@
         </para>
       </listitem>
       <listitem>
+<literallayout>Pulseaudio has been upgraded to version 15.0 and now optionally <link xlink:href="https://www.freedesktop.org/wiki/Software/PulseAudio/Notes/15.0/#supportforldacandaptxbluetoothcodecsplussbcxqsbcwithhigher-qualityparameters">supports additional Bluetooth audio codecs</link> like aptX or LDAC, with codec switching support being available in <literal>pavucontrol</literal>. This feature is disabled by default but can be enabled by using <literal>hardware.pulseaudio.package = pkgs.pulseaudioFull;</literal>.
+Existing 3rd party modules that provided similar functionality, like <literal>pulseaudio-modules-bt</literal> or <literal>pulseaudio-hsphfpd</literal> are deprecated and have been removed.</literallayout>
+      </listitem>
+      <listitem>
         <para>
           The new
           <link xlink:href="https://nixos.org/manual/nixpkgs/stable/#sec-postgresqlTestHook"><literal>postgresqlTestHook</literal></link>

nixos/doc/manual/release-notes/rl-2205.section.md

@@ -27,6 +27,9 @@ In addition to numerous new and upgraded packages, this release has the followin
 
 - Systemd has been upgraded to the version 250.
 
+- Pulseaudio has been upgraded to version 15.0 and now optionally [supports additional Bluetooth audio codecs](https://www.freedesktop.org/wiki/Software/PulseAudio/Notes/15.0/#supportforldacandaptxbluetoothcodecsplussbcxqsbcwithhigher-qualityparameters) like aptX or LDAC, with codec switching support being available in `pavucontrol`. This feature is disabled by default but can be enabled by using `hardware.pulseaudio.package = pkgs.pulseaudioFull;`.  
+  Existing 3rd party modules that provided similar functionality, like `pulseaudio-modules-bt` or `pulseaudio-hsphfpd` are deprecated and have been removed.
+
 - The new [`postgresqlTestHook`](https://nixos.org/manual/nixpkgs/stable/#sec-postgresqlTestHook) runs a PostgreSQL server for the duration of package checks.
 
 - [`kops`](https://kops.sigs.k8s.io) defaults to 1.22.4, which will enable [Instance Metadata Service Version 2](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/configuring-instance-metadata-service.html) and require tokens on new clusters with Kubernetes 1.22. This will increase security by default, but may break some types of workloads. See the [release notes](https://kops.sigs.k8s.io/releases/1.22-notes/) for details.