dt-bindings: iio: adc: max1238: Fix a typo in the description

Fix a typo in the description, where "interface" is spelled incorrectly.
Signed-off-by: Fabio Estevam <festevam@denx.de>
Link: https://lore.kernel.org/r/20221216004015.2902966-1-festevam@denx.deSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/adc/maxim,max1238.yaml

@@ -10,7 +10,7 @@ maintainers:
   - Jonathan Cameron <jic23@kernel.org>
 
 description: |
-  Family of simple ADCs with i2c inteface and internal references.
+  Family of simple ADCs with i2c interface and internal references.
 
 properties:
   compatible: