nixos/frr: add to release notes

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

@@ -75,6 +75,14 @@
           <link linkend="opt-services.filebeat.enable">services.filebeat</link>.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          <link xlink:href="https://frrouting.org/">FRRouting</link>, a
+          popular suite of Internet routing protocol daemons (BGP, BFD,
+          OSPF, IS-IS, VVRP and others). Available as
+          <link linkend="opt-services.ffr.babel.enable">services.frr</link>
+        </para>
+      </listitem>
       <listitem>
         <para>
           <link xlink:href="https://github.com/hifi/heisenbridge">heisenbridge</link>,

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

@@ -19,12 +19,15 @@ In addition to numerous new and upgraded packages, this release has the followin
 ## New Services {#sec-release-22.05-new-services}
 
 - [aesmd](https://github.com/intel/linux-sgx#install-the-intelr-sgx-psw), the Intel SGX Architectural Enclave Service Manager. Available as [services.aesmd](#opt-services.aesmd.enable).
+
 - [rootless Docker](https://docs.docker.com/engine/security/rootless/), a `systemd --user` Docker service which runs without root permissions. Available as [virtualisation.docker.rootless.enable](options.html#opt-virtualisation.docker.rootless.enable).
 
 - [matrix-conduit](https://conduit.rs/), a simple, fast and reliable chat server powered by matrix. Available as [services.matrix-conduit](option.html#opt-services.matrix-conduit.enable).
 
 - [filebeat](https://www.elastic.co/guide/en/beats/filebeat/current/filebeat-overview.html), a lightweight shipper for forwarding and centralizing log data. Available as [services.filebeat](#opt-services.filebeat.enable).
 
+- [FRRouting](https://frrouting.org/), a popular suite of Internet routing protocol daemons (BGP, BFD, OSPF, IS-IS, VVRP and others). Available as [services.frr](#opt-services.ffr.babel.enable)
+
 - [heisenbridge](https://github.com/hifi/heisenbridge), a bouncer-style Matrix IRC bridge. Available as [services.heisenbridge](options.html#opt-services.heisenbridge.enable).
 
 - [PowerDNS-Admin](https://github.com/ngoduykhanh/PowerDNS-Admin), a web interface for the PowerDNS server. Available at [services.powerdns-admin](options.html#opt-services.powerdns-admin.enable).