Fix typo in watchdogd.conf.5

On the shell people will probably use tab completion and never notice,
but in the web version this caused a broken link.

Signed-off-by: Fiona Klute <fiona.klute@gmx.de>

man/watchdogd.conf.5

@@ -577,7 +577,7 @@ tempmon /sys/class/hwmon/hwmon1/temp1_input {
 .Ed
 .Sh SEE ALSO
 .Xr watchdogd 8
-.Xr watchdoctl 1
+.Xr watchdogctl 1
 .Sh AUTHORS
 .Nm
 is an improved version of the original, created by Michele d'Amico and