Fix spec failure on ruby 3.1
Fix spec failure on ruby 3.1

Because https://github.com/ruby/ruby/pull/5148 merged after Ruby 3.1.0 released.

13241b71a50dded0a7b021ec4f2fb6a995daace9 did not fix proc spec yet.

https://github.com/ruby/actions/runs/4718820699?check_suite_focus=true#step:18:173
```
  1)
  Proc#parameters adds * rest arg for "star" argument FAILED
  Expected [[:req, :x], [:rest]] == [[:req, :x], [:rest, :*]]
  to be truthy but was false
  /home/runner/work/actions/actions/snapshot-ruby_3_1/spec/ruby/core/proc/parameters_spec.rb:85:in `block (3 levels) in <top (required)>'
  /home/runner/work/actions/actions/snapshot-ruby_3_1/spec/ruby/core/proc/parameters_spec.rb:3:in `<top (required)>'
```

ruby/spec,nobu/rubyspec,nobu/rubyspec,nobu/rubyspec,ruby/spec,ruby/spec