The nrf52840-DK doesn't have this sensor built-in, so it's likely
users will be getting this sensor from a breakout board. The ones that
Sparkfun and Adafruit sell pull up the LSB address pin, so the default
address is 0x77 on those boards.
Let's follow along with them instead of using 0x76, because those are
the boards that come up first in the results when you google "BME280
breakout board" from where I'm sitting.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
06d50c673d