nixos/doc: add note about switching to exfatprogs

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

@@ -847,6 +847,15 @@ Superuser created successfully.
           release instead of 1.0.x
         </para>
       </listitem>
+      <listitem>
+        <para>
+          If <literal>exfat</literal> is included in
+          <literal>boot.supportedFilesystems</literal> and when using
+          kernel 5.7 or later, the <literal>exfatprogs</literal>
+          user-space utilities are used instead of
+          <literal>exfat</literal>.
+        </para>
+      </listitem>
     </itemizedlist>
   </section>
   <section xml:id="sec-release-21.11-notable-changes">

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

@@ -246,6 +246,9 @@ To be able to access the web UI this port needs to be opened in the firewall.
 
 - The `nomad` package now defaults to a 1.1.x release instead of 1.0.x
 
+- If `exfat` is included in `boot.supportedFilesystems` and when using kernel 5.7
+  or later, the `exfatprogs` user-space utilities are used instead of `exfat`.
+
 ## Other Notable Changes {#sec-release-21.11-notable-changes}
 
 - The setting [`services.openssh.logLevel`](options.html#opt-services.openssh.logLevel) `"VERBOSE"` `"INFO"`. This brings NixOS in line with upstream and other Linux distributions, and reduces log spam on servers due to bruteforcing botnets.