dt-bindings: hwmon: sensirion,shtc1: Clean up spelling mistakes and grammar

The yaml text contains some minor spelling mistakes and grammar issues,
clean these up.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220928213139.63819-1-colin.i.king@gmail.com


Signed-off-by: Guenter Roeck <linux@roeck-us.net>