[ruby/psych] Bump version to 4.0.1

https://github.com/ruby/psych/commit/4049939006
2021-06-07 12:19:26 +09:00 · 2021-06-07 12:19:26 +09:00 · 85b94144f2
--- a/ext/psych/lib/psych/versions.rb
+++ b/ext/psych/lib/psych/versions.rb
@ -2,7 +2,7 @@

 module Psych
  # The version of Psych you are using
-  VERSION = '4.0.0'
+  VERSION = '4.0.1'

  if RUBY_ENGINE == 'jruby'
    DEFAULT_SNAKEYAML_VERSION = '1.28'.freeze