Slight text correction

git-svn-id: http://svn.linuxfromscratch.org/LFS/branches/systemd/BOOK@10666 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter07/clock.xml

@@ -75,7 +75,7 @@ EOF</userinput></screen>
   <sect2>
     <title>Network Time Synchronization</title>
 
-    <para>Starting with version 214, systemd ships a daemon called
+    <para>Starting with version 213, systemd ships a daemon called
     <command>systemd-timesyncd</command> which can be used to
     synchronize the system time with remote NTP servers.</para>