docs: add changelog

Author: windmgc

README.md

@@ -182,6 +182,10 @@ Release process:
   [94](https://github.com/Kong/lua-resty-aws/pull/94)
 - fix: fix the bug of missing boolean type with a value of false in the generated request body
   [100](https://github.com/Kong/lua-resty-aws/pull/100)
+- feat: container credential provider now supports using auth token defined in
+  AWS_CONTAINER_AUTHORIZATION_TOKEN and AWS_CONTAINER_AUTHORIZATION_TOKEN_FILE.
+  [107](https://github.com/Kong/lua-resty-aws/pull/107)
+
 
 ### 1.3.6 (25-Dec-2023)