mariadb: mention multiple release support in release notes

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

@@ -534,6 +534,19 @@
           will now correctly remove those domains during rebuild/renew.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          MariaDB is now offered in several versions, not just the
+          newest one. So if you have a need for running MariaDB 10.4 for
+          example, you can now just set
+          <literal>services.mysql.package = pkgs.mariadb_104;</literal>.
+          In general, it is recommended to run the newest version, to
+          get the newest features, while sticking with an LTS version
+          will most likely provide a more stable experience. Sometimes
+          software is also incompatible with the newest version of
+          MariaDB.
+        </para>
+      </listitem>
       <listitem>
         <para>
           The option

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

@@ -184,6 +184,11 @@ In addition to numerous new and upgraded packages, this release has the followin
 - Removing domains from `security.acme.certs._name_.extraDomainNames`
   will now correctly remove those domains during rebuild/renew.
 
+- MariaDB is now offered in several versions, not just the newest one.
+  So if you have a need for running MariaDB 10.4 for example, you can now just set `services.mysql.package = pkgs.mariadb_104;`.
+  In general, it is recommended to run the newest version, to get the newest features, while sticking with an LTS version will most likely provide a more stable experience.
+  Sometimes software is also incompatible with the newest version of MariaDB.
+
 - The option
   [programs.ssh.enableAskPassword](#opt-programs.ssh.enableAskPassword) was
   added, decoupling the setting of `SSH_ASKPASS` from