Update CHANGELOG.md

Author: mhagmajer

CHANGELOG.md

@@ -2,12 +2,15 @@
 
 ## 1.39.0 (2021-08-30)
 
+**Breaking changes:**
+
+- Drop support for Node 6,7 ([#670](https://github.com/box/box-node-sdk/pull/670))
+
 **New Features and Enhancements:**
 
 - Add support for Box Sign API ([#658](https://github.com/box/box-node-sdk/pull/658))
 - Enhance TS Imports ([#656](https://github.com/box/box-node-sdk/pull/656))
 - Add support for is_external_collab_restricted User property ([#668](https://github.com/box/box-node-sdk/pull/668))
-- Drop support for Node 6,7 ([#670](https://github.com/box/box-node-sdk/pull/670))
 
 ## 1.38.0 (2021-08-05)