Fix github url for uavcan_v1/legacy_data_types
Fix github url for uavcan_v1/legacy_data_types

The URL is spelled wrong, it should be capital "PX4"

Signed-off-by: Jukka Laitinen <54fbbb86d054c21098e8394129eaf0c4113256f1@ssrc.tii.ae>

acfloria/Firmware,acfloria/Firmware,acfloria/Firmware,acfloria/Firmware,acfloria/Firmware,acfloria/Firmware,acfloria/Firmware