docs/library/ubluetooth.rst: Update char/desc flags.
docs/library/ubluetooth.rst: Update char/desc flags.

Signed-off-by: Jim Mussared <e84f5c941266186d0c97dcc873413469b954847e@gmail.com>

pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython