ci: fix ci error about wasm32-wasip1

[Darksonn]

CI is failing:

Run cargo wasi test --test rt_yield --features wasi-rt
error: toolchain 'stable-x86_64-unknown-linux-gnu' does not support target 'wasm32-wasi'; did you mean 'wasm32-wasip1'?
note: you can see a list of supported targets with `rustc --print=target-list`
note: if you are adding support for a new target to rustc itself, see https://rustc-dev-guide.rust-lang.org/building/new-target.html

Stack backtrace:
   0: anyhow::error::<impl core::convert::From<E> for anyhow::Error>::from
   1: rustup::toolchain::distributable::DistributableToolchain::add_component
   2: rustup::cli::rustup_mode::target_add
   3: rustup::cli::rustup_mode::main
   4: rustup_init::main
   5: std::sys_common::backtrace::__rust_begin_short_backtrace
   6: main
   7: <unknown>
   8: __libc_start_main
   9: <unknown>
error: failed to execute "rustup" "target" "add" "wasm[32](https://github.com/tokio-rs/tokio/actions/runs/12696581327/job/35391033832?pr=7081#step:9:33)-wasi"
    status: exit status: 1