Test if these work on PowerShell

Author: ocefpaf

.github/workflows/test-install-instructions.yml

@@ -38,8 +38,9 @@ jobs:
       - name: Install Miniforge3 on Windows
         shell: pwsh
         if: startsWith(matrix.os, 'windows')
+        # start /wait "" ${{ matrix.INSTALLER }} /InstallationType=JustMe /AddToPath=0 /RegisterPython=0 /S /D=C:\miniforge3
         run: |
-          start /wait "" ${{ matrix.INSTALLER }} /InstallationType=JustMe /AddToPath=0 /RegisterPython=0 /S /D=C:\miniforge3
+          Start-Process -FilePath "${{ matrix.INSTALLER }}" -ArgumentList "/S" -Wait
 
       - name: Create on *nix
         if: startsWith(matrix.os, 'ubuntu') || startsWith(matrix.os, 'macOS')