[llvm] [CodeGen] Fix documentation for ISD::ATOMIC_STORE (PR #108126)

[Peilin Ye via llvm-commits]

peilin-ye wrote:

Hi @topperc, thanks for asking!  Yes, that would be great since I don't seem to have write access.  There are 2 pre-submit checks (buildkite/github-pull-requests, buildkite/github-pull-requests/windows-windows-x64) that haven't completed yet though, do we need to wait for these?

https://github.com/llvm/llvm-project/pull/108126