dt-bindings: iio: ti,tmp117: fix documentation link

Fix the broken link to point to the correct homepage.

Fixes: 5e713b25 ("dt-bindings: iio: temperature: Add DT bindings for TMP117")
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230228090518.529811-2-m.felsch@pengutronix.de


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