ci: Update wasm build tool url for main workflow

Author: scottmarchant

.github/workflows/main.yml

@@ -33,6 +33,4 @@ jobs:
 
   wasm-sdk:
     name: WebAssembly Swift SDK
-    # TODO: Switch to this line after https://github.com/apple/swift-nio/pull/3159/ is merged
-    # uses: apple/swift-nio/.github/workflows/wasm_sdk.yml@main
-    uses: kateinoigakukun/swift-nio/.github/workflows/wasm_sdk.yml@katei/add-wasm-ci
+    uses: apple/swift-nio/.github/workflows/wasm_sdk.yml@main