dt-bindings: iio: temperature: ltc2983: use generic node name in example

Examples should use the generic IIO node name of temperature-sensor.
Fix it.

Signed-off-by: Cosmin Tanislav <cosmin.tanislav@analog.com>
Link: https://lore.kernel.org/r/20221103130041.2153295-12-demonsingur@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>