docs: ABI: Fix spelling mistake in pretimeout_avaialable_governors

There is a spelling mistake, pretimeout_avaialable_governors should
be pretimeout_available_governors. Fix it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20241030102624.3085369-1-colin.i.king@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Author: ColinIanKing

Documentation/ABI/testing/sysfs-class-watchdog

@@ -76,7 +76,7 @@ Description:
 		timeout when the pretimeout interrupt is delivered.  Pretimeout
 		is an optional feature.
 
-What:		/sys/class/watchdog/watchdogn/pretimeout_avaialable_governors
+What:		/sys/class/watchdog/watchdogn/pretimeout_available_governors
 Date:		February 2017
 Contact:	Wim Van Sebroeck <wim@iguana.be>
 Description: