Merge pull request #63735 from Ekleog/drop-old-kernels

manual: remind to drop kernels that will get EOL'd

nixos/doc/manual/development/releases.xml

@@ -98,6 +98,16 @@
       <literal>stableBranch</literal> set to false.
      </para>
     </listitem>
+    <listitem>
+     <para>
+      Remove attributes that we know we will not be able to support,
+      especially if there is a stable alternative. E.g. Check that our
+      Linux kernels'
+      <link xlink:href="https://www.kernel.org/category/releases.html">
+      projected end-of-life</link> are after our release projected
+      end-of-life
+     </para>
+    </listitem>
     <listitem>
      <para>
       Edit changelog at