Document in CHANGELOG

Author: kddnewton

CHANGELOG.md

@@ -10,6 +10,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) a
 
 - [#65](https://github.com/ruby-syntax-tree/syntax_tree/pull/65) - Add a rubocop config at `config/rubocop.yml` that we can ship with the gem so folks can inherit from it to get their styling correct.
 - [#65](https://github.com/ruby-syntax-tree/syntax_tree/pull/65) - Improve hash pattern formatting by a lot - multiple lines are now not so ugly.
+- [#62](https://github.com/ruby-syntax-tree/syntax_tree/issues/62) - Add `options` as a method on `SyntaxTree::RegexpLiteral`, add it to pattern matching, and describe it using the `SyntaxTree::Visitor::FieldVisitor` class.
 
 ## [2.3.1] - 2022-04-22