[ruby/prism] Fix to parse * as forwarding in foo[*] case
*
foo[*]
Fix https://github.com/ruby/prism/pull/1924
https://github.com/ruby/prism/commit/7cde900065
[ruby/prism] Fix to parse
*as forwarding infoo[*]caseFix https://github.com/ruby/prism/pull/1924
https://github.com/ruby/prism/commit/7cde900065