CI: Pin Windows SDK version to 10.0.22621.0

Author: kateinoigakukun

.github/workflows/main.yml

@@ -207,7 +207,16 @@ jobs:
       # - run: cmake -G Ninja -B .build/cmake
       # - run: cmake --build .build/cmake
       # Run tests with SwiftPM
-      - run: swift test
+      - run: |
+          $Win10SdkRoot = Get-ItemPropertyValue `
+            -Path "Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Kits\Installed Roots" `
+            -Name "KitsRoot10"
+          $WinSDKVersion = "10.0.22621.0"
+          $ExtraFlags = @("-Xswiftc", "-windows-sdk-version", "-Xswiftc", "${WinSDKVersion}",
+              "-Xswiftc", "-windows-sdk-root", "-Xswiftc", "${Win10SdkRoot}",
+              "-Xbuild-tools-swiftc", "-windows-sdk-version", "-Xbuild-tools-swiftc", "${WinSDKVersion}",
+              "-Xbuild-tools-swiftc", "-windows-sdk-root", "-Xbuild-tools-swiftc", "${Win10SdkRoot}")
+          swift test @ExtraFlags
 
   build-cmake:
     runs-on: ubuntu-20.04