nixos/doc: check in converted docbook for 22.05 release notes

This was forgotten in 2768bc07f7 and
should hopefully avoid an all too confusing rebase / merge conflict
later.

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

@@ -0,0 +1,35 @@
+<section xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="sec-release-22.05">
+  <title>Release 22.05 (“Quokka”, 2022.05/??)</title>
+  <para>
+    In addition to numerous new and upgraded packages, this release has
+    the following highlights:
+  </para>
+  <itemizedlist spacing="compact">
+    <listitem>
+      <para>
+        Support is planned until the end of December 2022, handing over
+        to 22.11.
+      </para>
+    </listitem>
+  </itemizedlist>
+  <section xml:id="sec-release-22.05-highlights">
+    <title>Highlights</title>
+    <para>
+    </para>
+  </section>
+  <section xml:id="sec-release-22.05-new-services">
+    <title>New Services</title>
+    <para>
+    </para>
+  </section>
+  <section xml:id="sec-release-22.05-incompatibilities">
+    <title>Backward Incompatibilities</title>
+    <para>
+    </para>
+  </section>
+  <section xml:id="sec-release-22.05-notable-changes">
+    <title>Other Notable Changes</title>
+    <para>
+    </para>
+  </section>
+</section>