getDayOfWeek: fix hang on Windows 11 24H2+

[pps83]

wmic hangs indefinitely on recent Windows builds, leaving Gateway launches stuck after the banner with no log file and no Java spawned.

closes #357

[pps83]

After this change, it again deadlocked on this:

for /f "usebackq tokens=* skip=3" %%a in (`powershell -command "Get-CimInstance Win32_OperatingSystem | Select-Object Caption, Version, OSArchitecture"`) do echo Operating system:  %%a

I had to switch it to echo Operating system: %OS% %PROCESSOR_ARCHITECTURE% to make it work. No idea what was wrong.