[ruby/error_highlight] Use $stderr instead of STDERR for Ractor
$stderr
https://github.com/ruby/error_highlight/commit/a221a4b0eb
[ruby/error_highlight] Use
$stderr
instead of STDERR for Ractorhttps://github.com/ruby/error_highlight/commit/a221a4b0eb