fix the example of failed URI

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45496 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

tool/config_files.rb

@@ -1,6 +1,6 @@
 require 'open-uri'
 
-ConfigFiles = "http://git0.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=%s;hb=HEAD"
+ConfigFiles = "http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=%s;hb=HEAD"
 def ConfigFiles.download(name, dir = nil)
   uri = URI(self % name)
   data = uri.read