Update nightly toolchain on CI to 2025-08-27-a

Author: kateinoigakukun

.github/workflows/test.yml

@@ -21,12 +21,12 @@ jobs:
             target: "wasm32-unknown-wasi"
           - os: ubuntu-22.04
             toolchain:
-              download-url: https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT-SNAPSHOT-2025-06-12-a/swift-DEVELOPMENT-SNAPSHOT-2025-06-12-a-ubuntu22.04.tar.gz
+              download-url: https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT-SNAPSHOT-2025-08-27-a/swift-DEVELOPMENT-SNAPSHOT-2025-08-27-a-ubuntu22.04.tar.gz
             wasi-backend: Node
             target: "wasm32-unknown-wasi"
           - os: ubuntu-22.04
             toolchain:
-              download-url: https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT-SNAPSHOT-2025-06-12-a/swift-DEVELOPMENT-SNAPSHOT-2025-06-12-a-ubuntu22.04.tar.gz
+              download-url: https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT-SNAPSHOT-2025-08-27-a/swift-DEVELOPMENT-SNAPSHOT-2025-08-27-a-ubuntu22.04.tar.gz
             wasi-backend: Node
             target: "wasm32-unknown-wasip1-threads"
 
@@ -95,7 +95,7 @@ jobs:
       - uses: actions/checkout@v5
       - uses: ./.github/actions/install-swift
         with:
-          download-url: https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT-SNAPSHOT-2025-06-12-a/swift-DEVELOPMENT-SNAPSHOT-2025-06-12-a-ubuntu22.04.tar.gz
+          download-url: https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT-SNAPSHOT-2025-08-27-a/swift-DEVELOPMENT-SNAPSHOT-2025-08-27-a-ubuntu22.04.tar.gz
       - run: make bootstrap
       - run: ./Utilities/bridge-js-generate.sh
       - name: Check if BridgeJS generated files are up-to-date
@@ -112,7 +112,7 @@ jobs:
       - uses: actions/checkout@v5
       - uses: ./.github/actions/install-swift
         with:
-          download-url: https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT-SNAPSHOT-2025-06-12-a/swift-DEVELOPMENT-SNAPSHOT-2025-06-12-a-ubuntu22.04.tar.gz
+          download-url: https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT-SNAPSHOT-2025-08-27-a/swift-DEVELOPMENT-SNAPSHOT-2025-08-27-a-ubuntu22.04.tar.gz
       - uses: swiftwasm/setup-swiftwasm@v2
         id: setup-wasm32-unknown-wasi
         with: { target: wasm32-unknown-wasi }