chore: use nushell in ci

.github/workflows/rust.yml

@@ -73,7 +73,7 @@ jobs:
         $installs | ForEach-Object {
           if ($_.Url -ne $null) {
             Write-Host "Downloading $_.Name from $_.Url..."
-            Invoke-WebRequest -Uri $install.Url -OutFile "${{github.workspace}}\" + (Split-Path $_.Url -Leaf)
+            Invoke-WebRequest -Uri $_.Url -OutFile "${{github.workspace}}\" + (Split-Path $_.Url -Leaf)
           }
 
           Log "Starting installation of $($_.Name)..."