I could have sworn I saw it but I just checked and its no there yet. Sometimes it can take a few days to trickle down in the system.
The same thing happened earlier in the summer when IATA neglected to put the exemption for USA for the 'note verbale' requirement. (They must have the interns working Belgium over at IATA) After I emailed them and they corrected it, it took a few days to show up in TIMATIC.
Unless your flight is in the next few days, I wouldn't be too worried.