Replace `Kernel.#open` with `URI.open` in doc

Because `Kernel.#open` no longer opens URI since Ruby 3.0.

1 files changed, 2 insertions, 2 deletions

diff --git a/kernel.rb b/kernel.rb
index 04a371a7c8..4f7f6a38ca 100644
--- a/kernel.rb
+++ b/kernel.rb
@@ -105,7 +105,7 @@ module Kernel
   #     require 'json'
   #
   #     construct_url(arguments).
-  #       then {|url| open(url).read }.
+  #       then {|url| URI.open(url).read }.
   #       then {|response| JSON.parse(response) }
   #
   #  When called without block, the method returns +Enumerator+,
@@ -138,7 +138,7 @@ module Kernel
   #     require 'json'
   #
   #     construct_url(arguments).
-  #       then {|url| open(url).read }.
+  #       then {|url| URI.open(url).read }.
   #       then {|response| JSON.parse(response) }
   #
   def yield_self