iio: ABI: sysfs-bus-iio: fix a typo

Descrption -> Description

This causes some errors when parsed via scripts/get_abi.pl.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/fa90a2deebac80da42b1ad4cf570c4ace436577d.1621944866.git.mchehab+huawei@kernel.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/ABI/testing/sysfs-bus-iio

@@ -786,7 +786,7 @@ What:		/sys/.../events/in_capacitanceY_adaptive_thresh_rising_en
 What:		/sys/.../events/in_capacitanceY_adaptive_thresh_falling_en
 KernelVersion:	5.13
 Contact:	linux-iio@vger.kernel.org
-Descrption:
+Description:
 		Adaptive thresholds are similar to normal fixed thresholds
 		but the value is expressed as an offset from a value which
 		provides a low frequency approximation of the channel itself.
@@ -798,7 +798,7 @@ What:		/sys/.../in_capacitanceY_adaptive_thresh_rising_timeout
 What:		/sys/.../in_capacitanceY_adaptive_thresh_falling_timeout
 KernelVersion:	5.11
 Contact:	linux-iio@vger.kernel.org
-Descrption:
+Description:
 		When adaptive thresholds are used, the tracking signal
 		may adjust too slowly to step changes in the raw signal.
 		*_timeout (in seconds) specifies a time for which the