docs: fix a typo in drvlxc

s/the/The
Signed-off-by: NChen Hanxiao <chenhanxiao@cn.fujitsu.com>

docs/drvlxc.html.in

@@ -167,7 +167,7 @@ numbered incrementally from there.
 
 <p>
 Since /dev/ttyN and /dev/console are linked to the pts devices. The
-tty device of login program is pts device. the pam module securetty
+tty device of login program is pts device. The pam module securetty
 may prevent root user from logging in container. If you want root
 user to log in container successfully, add the pts device to the file
 /etc/securetty of container.