Update CHANGELOG.md and NOTICE

Author: elasticcloudclients

NOTICE

@@ -11,6 +11,6 @@ github.com/go-openapi/runtime                   Apache-2.0
 github.com/go-openapi/strfmt                    Apache-2.0
 github.com/blang/semver/v4                      MIT
 github.com/stretchr/testify                     MIT
-github.com/hashicorp/terraform-plugin-sdk/v2    MPL-2.0
+github.com/hashicorp/terraform-plugin-sdk/v2    MPL-2.0-no-copyleft-exception
 
 =========================================================================