[llvm] Add sync-up for floating-point working group (PR #71885)

[Andy Kaylor via llvm-commits]

andykaylor wrote:

> I think it's 4pm Eastern / 1pm West Coast. I looked at the calendar a few moments ago. It showed a time of 9pm UCT, which is 4pm Eastern.

Yes, that's what I intended.

https://github.com/llvm/llvm-project/pull/71885