[Librarian] Version Bump

CHANGELOG.md

@@ -1,6 +1,15 @@
 # Change Log
 All notable changes to this project will be documented in this file.
 
+[2020-09-28] Version 4.6.6
+--------------------------
+**Library - Docs**
+- [PR #504](https://github.com/sendgrid/sendgrid-java/pull/504): Update documentation for GET /templates. Thanks to [@LinkedList](https://github.com/LinkedList)!
+
+**Library - Fix**
+- [PR #649](https://github.com/sendgrid/sendgrid-java/pull/649): update the eventwebhook sample data, example, tests, and byte handling. Thanks to [@childish-sambino](https://github.com/childish-sambino)!
+
+
 [2020-09-16] Version 4.6.5
 --------------------------
 **Library - Docs**