Download aqtinstall through the wangguofang.net GitHub proxy

Also update vm-images: download Win32-OpenSSH through the same proxy.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

seediso/windows11/60-Install-Qt6.bat

@@ -23,7 +23,7 @@ set "QT_ARCH=win64_%QT_DIR%"
 
 rem aqt has no Arm64 build; the x64 one runs under emulation on Arm64 Windows.
 echo Downloading aqtinstall...
-curl.exe -L --fail -o "%AQT%" https://github.com/miurahr/aqtinstall/releases/download/v3.3.0/aqt_x64.exe
+curl.exe -L --fail -o "%AQT%" https://wangguofang.net/github.com/miurahr/aqtinstall/releases/download/v3.3.0/aqt_x64.exe
 if errorlevel 1 (
     echo Download failed.
     if not defined INSTALL_ALL pause