* Lock rubocop and standard versions for json dependencies

  https://github.com/ruby/actions/actions/runs/6854220854/job/18636881910

  current directory: /home/runner/work/actions/actions/snapshot-ruby_3_1/tmp/7/gems/rubocop/ruby/3.1.0/gems/json-2.6.1/ext/json/ext/generator
  /usr/local/bin/ruby -I /home/runner/work/actions/actions/snapshot-ruby_3_1/lib extconf.rb
  extconf failed No such file or directory - /usr/local/bin/ruby

* Lock parser version to remove racc dependency