chore: fix install script

Author: aslamcodes

win_install.ps1

@@ -1,14 +1,12 @@
-param(
-  [string]$Version
-)
+$Version = $args[0]
+
+if (-not $Version) {
+  throw "Usage: iex <script> v0.2.0"
+}
 
 function Install-AppStreamFile {
   param([string]$Version)
 
-  if (-not $Version) {
-    throw "Usage: iwr ... | iex -Version v0.2.0"
-  }
-
   $repo    = "aslamcodes/appstreamfile"
   $baseUrl = "https://github.com/$repo/releases/download/$Version"
   $dir     = "$env:TEMP\appstreamfile"
@@ -38,4 +36,4 @@ function Install-AppStreamFile {
   & $exe --help
 }
 
-Install-AppStreamFile -Version $Version
+Install-AppStreamFile $Version