build(cargo): add deps for the wasi (#61784)

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### Why?

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Closes NEXT-
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### What?

minor config update to the deps to include tokio for the wasi target.


Closes PACK-2435

packages/next-swc/crates/napi/Cargo.toml

@@ -112,6 +112,11 @@ turbopack-binding = { workspace = true, features = [
   "__feature_mdx_rs",
 ] }
 
+# wasi-only dependencies.
+[target.wasm32-wasi-preview1-threads.dependencies]
+# this requires tokio_unstable currently.
+tokio = { workspace = true, features = ["full"] }
+
 [build-dependencies]
 napi-build = "2"
 serde = "1"