Fix a typo in ntrig.rst (found with 'codespell').

Signed-off-by: Randy Dunlap <redacted>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: linux-input@vger.kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
---
 Documentation/input/devices/ntrig.rst |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/Documentation/input/devices/ntrig.rst
+++ b/Documentation/input/devices/ntrig.rst

@@ -32,7 +32,7 @@ The following parameters are used to con
 |activation_height,	|size threshold to activate immediately		      |
 |activation_width	|						      |
 +-----------------------+-----------------------------------------------------+
-|min_height,		|size threshold bellow which fingers are ignored      |
+|min_height,		|size threshold below which fingers are ignored       |
 |min_width		|both to decide activation and during activity	      |
 +-----------------------+-----------------------------------------------------+