Set NoNewLine in launchsettings generation (#5797)

Ensure final new-line uses unix line feed.

Author: JoshLove-msft

packages/http-client-csharp/eng/scripts/Generate.ps1

@@ -185,5 +185,5 @@ if ($null -eq $filter) {
     # Write the launch settings to the launchSettings.json file
     $launchSettingsPath = Join-Path $solutionDir "Microsoft.Generator.CSharp" "src" "Properties" "launchSettings.json"
     # Write the settings to JSON and normalize line endings to Unix style (LF)
-    $sortedLaunchSettings | ConvertTo-Json | ForEach-Object { $_ -replace "`r`n", "`n" } | Set-Content $launchSettingsPath
+    $sortedLaunchSettings | ConvertTo-Json | ForEach-Object { ($_ -replace "`r`n", "`n") + "`n" } | Set-Content -NoNewLine $launchSettingsPath
 }