Rollup merge of #56682 - alexcrichton:update-stdsimd, r=nikomatsakis
Rollup merge of #56682 - alexcrichton:update-stdsimd, r=nikomatsakis

Update the stdsimd submodule

Includes some new stabilized intrinsics for the wasm32 target!

Closes #56292

graydon/rust,aidancully/rust,graydon/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,graydon/rust,aidancully/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,graydon/rust,GBGamer/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust