dt-bindings: iio: humidity: hdc3020: add interrupt bindings in example

Add interrupt bindings in example.

Signed-off-by: Dimitri Fedrau <dima.fedrau@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20240214085350.19382-3-dima.fedrau@gmail.com


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>