boards: arduino: nicla_vision: fix VL53L1X I2C address

Nicla Vision datasheet is referring to the 8-bit wire address (0x52) for
the VL53L1X sensor, so that's likely what ended up being used in the
board's devicetree. However, it's the 7-bit I2C address that should be
used so fix that by changing the I2C address to 0x29. Successfully
tested on actual hardware.

Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>