Update trivial-devices.yaml with Sensirion,sht4x

Add Sensirion SHT4x, a precision temperature and humidity sensor, to
trivial-devices.yaml.
Signed-off-by: David Mosberger-Tang <davidm@egauge.net>
Link: https://lore.kernel.org/r/20211121161320.2312393-1-davidm@egauge.netSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/trivial-devices.yaml

@@ -281,6 +281,8 @@ properties:
           - sensirion,sgp30
             # Sensirion gas sensor with I2C interface
           - sensirion,sgp40
+            # Sensirion temperature & humidity sensor with I2C interface
+          - sensirion,sht4x
             # Sensortek 3 axis accelerometer
           - sensortek,stk8312
             # Sensortek 3 axis accelerometer