Auto merge of #121185 - GuillaumeGomez:update-stdarch, r=Amanieu

Update stdarch submodule

I'm syncing the rustc_codegen_gcc backend currently and it seems that the new rustc version we use is not happy with the current stdarch submodule version: https://github.com/rust-lang/rustc_codegen_gcc/actions/runs/7930753019/job/21653642490?pr=439

r? `@Amanieu`