Add CHANGELOG entry for #203

Author: aaron-lane

CHANGELOG.md

@@ -18,7 +18,7 @@ Extending the adopted spec, each change should have a link to its corresponding
 * Support to scale the default node cluster. [#149]
 * Support for configuring the network policy provider. [#159]
 * Support for database encryption. [#165]
-* Submodules for public and private clusters with beta features. [#124] [#188]
+* Submodules for public and private clusters with beta features. [#124] [#188] [#203]
 * Support for configuring cluster IPv4 CIDRs. [#193]
 * Support for configuring IP Masquerade. [#187]
 * Support for v2.9 of the Google providers. [#198]
@@ -145,6 +145,7 @@ Extending the adopted spec, each change should have a link to its corresponding
 [v0.3.0]: https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/compare/v0.2.0...v0.3.0
 [v0.2.0]: https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/compare/v0.1.0...v0.2.0
 
+[#203]: https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/pull/203
 [#198]: https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/pull/198
 [#197]: https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/pull/197
 [#193]: https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/pull/193