Fixes #37: Incorrect os architecture detection on localized OS

This change replaces the call to Get-CimInstance Win32_operatingsystem, which returns a localized string (e.g. 64-bitowy on a Polish OS) with [Environment]::Is64BitOperatingSystem.

Signed-off-by: AbstractionFactory <[email protected]>

static/install-opentofu.ps1

@@ -355,7 +355,7 @@ function installStandalone() {
     logInfo "Downloading OpenTofu version ${opentofuVersion}..."
 
     $tempPath = tempdir
-    if ((Get-CimInstance Win32_operatingsystem).OSArchitecture -eq "64-bit") {
+    if ([Environment]::Is64BitOperatingSystem) {
         $arch = "amd64"
     } else {
         $arch = "386"