Update changes in README

Author: zanieb

README.md

@@ -6,4 +6,11 @@ A Python implementation of the [mustache templating language](http://mustache.gi
 
 This library is a fork of [chevron](https://github.com/noahmorrison/chevron) authored by [Noah Morrison](https://github.com/noahmorrison).
 
-At this time, the only changes are switching to a modern build system, dropping support for Python 2, and verifying support for Python 3.7+.
+The following changes have been made:
+
+- Switched to a modern build system (`poetry`)
+- Switched to GitHub Actions for CI
+- Used Ruff for linting and formatting
+- Dropped support for Python 2
+- Verified support for Python 3.7 - 3.12
+- Fixed bug where variables could be incorrectly resolved from other scopes (see [#3](https://github.com/zanieb/chevron-blue/pull/3))