Update `documentation_syntax_check` to use the Ruby 3.0 parser.
Update `documentation_syntax_check` to use the Ruby 3.0 parser.

maxjacobson/rubocop,maxjacobson/rubocop,tejasbubane/rubocop,bbatsov/rubocop,rrosenblum/rubocop,maxjacobson/rubocop,rrosenblum/rubocop,rrosenblum/rubocop,tejasbubane/rubocop,bbatsov/rubocop,tejasbubane/rubocop