swift 6.1 is latest available in setup action

Author: skarim

.github/workflows/tests.yml

@@ -13,12 +13,12 @@ jobs:
           node-version: 20
       - uses: swift-actions/setup-swift@v2
         with:
-          swift-version: '6.2'
+          swift-version: '6.1'
 
       - name: Install Swift WASI SDK
         run: |
           set -euxo pipefail
-          SWIFT_WASI_SDK_URL="https://download.swift.org/swift-6.2-release/wasm/swift-6.2-RELEASE/swift-6.2-RELEASE_wasm.artifactbundle.tar.gz"
+          SWIFT_WASI_SDK_URL="https://download.swift.org/swift-6.1-release/wasm/swift-6.1-RELEASE/swift-6.1-RELEASE_wasm.artifactbundle.tar.gz"
           swift --version
           swift sdk install "$SWIFT_WASI_SDK_URL"
         

scripts/build-wasm.sh

@@ -4,7 +4,7 @@ set -euo pipefail
 # Build SwiftSyntax+SwiftParser to WebAssembly (WASI Reactor)
 # Prereqs (one-time): install Swift 6.x toolchain (see README.md for instructions)
 
-SWIFT_SDK_ID=${SWIFT_SDK_ID:-"swift-6.2-RELEASE_wasm"}
+SWIFT_SDK_ID=${SWIFT_SDK_ID:-"$(swift sdk list | grep 'swift-.*_wasm$' | head -n 1 | cut -d' ' -f1)"}
 
 pushd swift >/dev/null
 swift build -c release \