nixos/rstudio-server: add to 22.05 release notes

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

@@ -165,6 +165,14 @@
           <link xlink:href="options.html#opt-services.timetagger.enable">services.timetagger</link>.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          <link xlink:href="https://www.rstudio.com/products/rstudio/#rstudio-server">rstudio-server</link>,
+          a browser-based version of the RStudio IDE for the R
+          programming language. Available as
+          <link xlink:href="options.html#opt-services.rstudio-server.enable">services.rstudio-server</link>.
+        </para>
+      </listitem>
     </itemizedlist>
   </section>
   <section xml:id="sec-release-22.05-incompatibilities">

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

@@ -50,6 +50,8 @@ In addition to numerous new and upgraded packages, this release has the followin
 
 - [timetagger](https://timetagger.app), an open source time-tracker with an intuitive user experience and powerful reporting. [services.timetagger](options.html#opt-services.timetagger.enable).
 
+- [rstudio-server](https://www.rstudio.com/products/rstudio/#rstudio-server), a browser-based version of the RStudio IDE for the R programming language. Available as [services.rstudio-server](options.html#opt-services.rstudio-server.enable).
+
 ## Backward Incompatibilities {#sec-release-22.05-incompatibilities}
 
 - `pkgs.ghc` now refers to `pkgs.targetPackages.haskellPackages.ghc`.