release-notes: update release notes about mysql57 drop

nixos/doc/manual/from_md/release-notes/rl-2211.section.xml

@@ -631,6 +631,24 @@
           due to upstream dropping support.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          <literal>mysql57</literal> has been removed. Please update to
+          <literal>mysql80</literal> or <literal>mariadb</literal>. See
+          the
+          <link xlink:href="https://mariadb.com/kb/en/upgrading-from-mysql-to-mariadb/">upgrade
+          guide</link> for more information.
+        </para>
+      </listitem>
+      <listitem>
+        <para>
+          Consequently, <literal>cqrlog</literal> and
+          <literal>amorok</literal> now use <literal>mariadb</literal>
+          instead of <literal>mysql57</literal> for their embedded
+          databases. Running <literal>mysql_upgrade</literal> may be
+          neccesary.
+        </para>
+      </listitem>
       <listitem>
         <para>
           <literal>k3s</literal> supports <literal>clusterInit</literal>

nixos/doc/manual/release-notes/rl-2211.section.md

@@ -208,6 +208,9 @@ Available as [services.patroni](options.html#opt-services.patroni.enable).
 
 - `k3s` no longer supports docker as runtime due to upstream dropping support.
 
+- `mysql57` has been removed. Please update to `mysql80` or `mariadb`. See the [upgrade guide](https://mariadb.com/kb/en/upgrading-from-mysql-to-mariadb/) for more information.
+
+- Consequently, `cqrlog` and `amorok` now use `mariadb` instead of `mysql57` for their embedded databases. Running `mysql_upgrade` may be neccesary.
 - `k3s` supports `clusterInit` option, and it is enabled by default, for servers.
 
 - `stylua` no longer accepts `lua52Support` and `luauSupport` overrides, use `features` instead, which defaults to `[ "lua54" "luau" ]`.