fix: use curl.exe instead of powershell

update-runtime.cmd

@@ -1,5 +1,7 @@
 @echo off
-powershell.exe -File .\download_micromamba.ps1
+:Check if micromamba is already installed
+if exist micromamba.exe goto Isolation
+  curl.exe -L -o micromamba.exe https://github.com/mamba-org/micromamba-releases/releases/$VERSION/download/micromamba-win-64
 
 cd /d "%~dp0"