nixos/doc/rl-2205: Add note about reduced closure of python3.pkgs.matplotlib

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

@@ -149,6 +149,20 @@
           migration guide</link> for more details.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          For <literal>pkgs.python3.pkgs.ipython</literal>, its direct
+          dependency
+          <literal>pkgs.python3.pkgs.matplotlib-inline</literal> (which
+          is really an adapter to integrate matplotlib in ipython if it
+          is installed) does not depend on
+          <literal>pkgs.python3.pkgs.matplotlib</literal> anymore. This
+          is closer to a non-Nix install of ipython. This has the added
+          benefit to reduce the closure size of
+          <literal>ipython</literal> from ~400MB to ~160MB (including
+          ~100MB for python itself).
+        </para>
+      </listitem>
     </itemizedlist>
   </section>
   <section xml:id="sec-release-22.05-notable-changes">

nixos/doc/manual/release-notes/rl-2205.section.md

@@ -53,6 +53,13 @@ In addition to numerous new and upgraded packages, this release has the followin
 
 - The `autorestic` package has been upgraded from 1.3.0 to 1.5.0 which introduces breaking changes in config file, check [their migration guide](https://autorestic.vercel.app/migration/1.4_1.5) for more details.
 
+- For `pkgs.python3.pkgs.ipython`, its direct dependency `pkgs.python3.pkgs.matplotlib-inline`
+  (which is really an adapter to integrate matplotlib in ipython if it is installed) does
+  not depend on `pkgs.python3.pkgs.matplotlib` anymore.
+  This is closer to a non-Nix install of ipython.
+  This has the added benefit to reduce the closure size of `ipython` from ~400MB to ~160MB
+  (including ~100MB for python itself).
+
 ## Other Notable Changes {#sec-release-22.05-notable-changes}
 
 - The option [services.redis.servers](#opt-services.redis.servers) was added