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 <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
Signed-off-by: Wim Van Sebroeck <[email protected]>

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 <[email protected]>
 Description: