[ruby/psych] Bump up psych version to 4.0.2

https://github.com/ruby/psych/commit/69a713f860
2021-10-21 13:48:51 +09:00 · 2021-10-21 13:48:51 +09:00 · 5823168706
--- 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 = '4.0.1'
+  VERSION = '4.0.2'
  if RUBY_ENGINE == 'jruby'
    DEFAULT_SNAKEYAML_VERSION = '1.28'.freeze