[2005] remove spelling typo

doc/guide/bind10-guide.xml

@@ -2164,7 +2164,7 @@ DDNS/zones[0]/update_acl[1]     {"action": "ACCEPT", "from": "::1", "key": "key.
         DDNS transaction, is automatically recorded in the underlying
         data source, and can be retrieved in the form of outbound
         IXFR.
-        This is done automaticallyl; it does not require specific
+        This is done automatically; it does not require specific
         configuration to make this possible.
       </para>
     </section>