website: fix downloads

Author: mitchellh

website/helpers/download_helpers.rb

@@ -33,8 +33,8 @@
 module DownloadHelpers
   def download_arch(file)
     parts = file.split("_")
-    return "" if parts.length != 4
-    parts[3].split(".")[0]
+    return "" if parts.length != 3
+    parts[2].split(".")[0]
   end
 
   def download_os_human(os)