nixos/doc: fix merged items in 20.09 rel notes

These items (notmuch and device tree) are completely different topics,
so were obviously merged into a single bullet by mistake.

nixos/doc/manual/from_md/release-notes/rl-2009.section.xml

@@ -1684,13 +1684,17 @@ CREATE ROLE postgres LOGIN SUPERUSER;
       </listitem>
       <listitem>
         <para>
-          The notmuch package move its emacs-related binaries and emacs
+          The notmuch package moves its emacs-related binaries and emacs
           lisp files to a separate output. They're not part of the
           default <literal>out</literal> output anymore - if you relied
           on the <literal>notmuch-emacs-mua</literal> binary or the
           emacs lisp files, access them via the
-          <literal>notmuch.emacs</literal> output. Device tree overlay
-          support was improved in
+          <literal>notmuch.emacs</literal> output.
+        </para>
+      </listitem>
+      <listitem>
+        <para>
+          Device tree overlay support was improved in
           <link xlink:href="https://github.com/NixOS/nixpkgs/pull/79370">#79370</link>
           and now uses
           <link xlink:href="options.html#opt-hardware.deviceTree.kernelPackage">hardware.deviceTree.kernelPackage</link>

nixos/doc/manual/release-notes/rl-2009.section.md

@@ -578,7 +578,9 @@ When upgrading from a previous release, please be aware of the following incompa
 
 - `services.journald.rateLimitBurst` was updated from `1000` to `10000` to follow the new upstream systemd default.
 
-- The notmuch package move its emacs-related binaries and emacs lisp files to a separate output. They\'re not part of the default `out` output anymore - if you relied on the `notmuch-emacs-mua` binary or the emacs lisp files, access them via the `notmuch.emacs` output. Device tree overlay support was improved in [\#79370](https://github.com/NixOS/nixpkgs/pull/79370) and now uses [hardware.deviceTree.kernelPackage](options.html#opt-hardware.deviceTree.kernelPackage) instead of `hardware.deviceTree.base`. [hardware.deviceTree.overlays](options.html#opt-hardware.deviceTree.overlays) configuration was extended to support `.dts` files with symbols. Device trees can now be filtered by setting [hardware.deviceTree.filter](options.html#opt-hardware.deviceTree.filter) option.
+- The notmuch package moves its emacs-related binaries and emacs lisp files to a separate output. They\'re not part of the default `out` output anymore - if you relied on the `notmuch-emacs-mua` binary or the emacs lisp files, access them via the `notmuch.emacs` output.
+
+- Device tree overlay support was improved in [\#79370](https://github.com/NixOS/nixpkgs/pull/79370) and now uses [hardware.deviceTree.kernelPackage](options.html#opt-hardware.deviceTree.kernelPackage) instead of `hardware.deviceTree.base`. [hardware.deviceTree.overlays](options.html#opt-hardware.deviceTree.overlays) configuration was extended to support `.dts` files with symbols. Device trees can now be filtered by setting [hardware.deviceTree.filter](options.html#opt-hardware.deviceTree.filter) option.
 
 - The default output of `buildGoPackage` is now `$out` instead of `$bin`.