Improved open-uri example [skip ci]

README.md

@@ -429,7 +429,7 @@ Raises
 ### open-uri
 
 ```ruby
-URI.open(url, open_timeout: 1, read_timeout: 1)
+URI.parse(url).open(open_timeout: 1, read_timeout: 1)
 ```
 
 Raises

test/open_uri_test.rb

@@ -5,13 +5,13 @@
 class OpenUriTest < Minitest::Test
   def test_connect
     assert_timeout(Net::OpenTimeout) do
-      URI.open(connect_url, open_timeout: 1)
+      URI.parse(connect_url).open(open_timeout: 1)
     end
   end
 
   def test_read
     assert_timeout(Net::ReadTimeout) do
-      URI.open(read_url, read_timeout: 1)
+      URI.parse(read_url).open(read_timeout: 1)
     end
   end
 end