docs: Add changelog for 2.1.0

Author: jdrew82

CHANGELOG.md

@@ -4,6 +4,20 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## [2.1.0]
+
+### Changed
+
+- [284](https://github.com/networktocode/diffsync/pull/284) - Update pyyaml to 6.0.2 in poetry.lock by @gsnider2195
+- [286](https://github.com/networktocode/diffsync/pull/286) - Update GitHub Actions runner version by @mjbear
+- [289](https://github.com/networktocode/diffsync/pull/289) - Remove upper limit on Packaging by @jdrew82
+
+## New Contributors
+
+- @gsnider2195 made their first contribution in https://github.com/networktocode/diffsync/pull/284
+- @mjbear made their first contribution in https://github.com/networktocode/diffsync/pull/286
+- @jdrew82 made their first contribution in https://github.com/networktocode/diffsync/pull/289
+
 ## [2.0.1]
 
 ### Changed