[sig][upgrades] IRC meeting Monday 18th->25th

Hi All In a feat of random planning weirdness, both the last and the upcoming Upgrades SIG IRC meeting days have landed on a US holiday. As the last one was a bit of a flop due to this co-incidence I'm proposing we bump back one week and move the IRC meetings from the 18th->25th February. They will be at 0900 and 1600 UTC as usual to cover as many participants as possible! If you're based on the US - have a lovely Presidents day! Cheers James