Bump bin/prism bundle to Ruby 4.0

`gemfiles/3.5/Gemfile` has been updated to `gemfiles/4.0/Gemfile` by #3715.
This PR also updates the `ruby` version in `gemfiles/4.0/Gemfile` to `4.0.0dev`.

Author: koic

bin/prism

@@ -99,7 +99,7 @@ module Prism
         ["3.2", ["3.2"]],
         ["3.3", ["3.3"]],
         ["3.4", ["3.4", "typecheck"]],
-        ["3.5", ["3.5"]],
+        ["4.0", ["4.0"]],
         ["jruby", ["jruby"]],
         ["truffleruby", ["truffleruby"]]
       ].each do |ruby_version, gemfiles|

gemfiles/4.0/Gemfile

@@ -2,7 +2,7 @@
 
 source "https://rubygems.org"
 
-ruby ">= 3.5.0.dev"
+ruby ">= 4.0.0.dev"
 
 gemspec path: "../.."
 

gemfiles/4.0/Gemfile.lock

@@ -49,7 +49,7 @@ DEPENDENCIES
   test-unit
 
 RUBY VERSION
-   ruby 3.5.0.dev
+   ruby 4.0.0.dev
 
 BUNDLED WITH
    4.0.0.dev