Update script source to install the .Net SDK

Author: Francisco-Gamino

tools/helper.psm1

@@ -64,7 +64,7 @@ function Install-Dotnet {
         return  # Simply return if we find dotnet SDk with the correct version
     } catch { }
 
-    $obtainUrl = "https://raw.githubusercontent.com/dotnet/cli/master/scripts/obtain"
+    $obtainUrl = "https://dot.net/v1/"
 
     try {
         $installScript = if ($IsWindowsEnv) { "dotnet-install.ps1" } else { "dotnet-install.sh" }