nixos/doc/rl-2211: add entry for aarch64-linux jobset inclusion/images on homepage

(cherry picked from commit 881f22670e)

nixos/doc/manual/from_md/release-notes/rl-2211.section.xml

@@ -216,6 +216,23 @@
           release announcement</link> for more information.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          <literal>aarch64-linux</literal> is now included in the
+          <literal>nixos-22.11</literal> and
+          <literal>nixos-22.11-small</literal> channels. This means that
+          <literal>x86_64-linux</literal> and
+          <literal>aarch64-linux</literal> will recieve updates at the
+          same time.
+        </para>
+      </listitem>
+      <listitem>
+        <para>
+          <literal>aarch64-linux</literal> ISOs are now available on the
+          <link xlink:href="https://nixos.org/download.html">downloads
+          page</link>.
+        </para>
+      </listitem>
     </itemizedlist>
   </section>
   <section xml:id="sec-release-22.11-internal">

nixos/doc/manual/release-notes/rl-2211.section.md

@@ -61,6 +61,10 @@ In addition to numerous new and upgraded packages, this release includes the fol
 
 - `hardware.nvidia` has a new option, `hardware.nvidia.open`, that can be used to enable the usage of NVIDIA's open-source kernel driver. Note that the driver's support for GeForce and Workstation GPUs is still alpha quality, see [the release announcement](https://developer.nvidia.com/blog/nvidia-releases-open-source-gpu-kernel-modules/) for more information.
 
+- `aarch64-linux` is now included in the `nixos-22.11` and `nixos-22.11-small` channels. This means that `x86_64-linux` and `aarch64-linux` will recieve updates at the same time.
+
+- `aarch64-linux` ISOs are now available on the [downloads page](https://nixos.org/download.html).
+
 ## Internal changes {#sec-release-22.11-internal}
 
 - Improved performances of `lib.closePropagation` which was previously quadratic. This is used in e.g. `ghcWithPackages`. Please see backward incompatibilities notes below.