set_publication in ConfigClient model doesn't match with its message

[diocorreia]

In models/models.py, RFU should be in lowercase to match with ConfigModelPublicationSet Struct

python-bluetooth-mesh/bluetooth_mesh/models/models.py

Line 911 in cccf7fd

RFU=0,

python-bluetooth-mesh/bluetooth_mesh/models/models.py

Line 932 in cccf7fd

RFU=0,