chore: release 9.4.0 (#573)

* updated CHANGELOG.md [ci skip]

* updated README.md

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -6,6 +6,22 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 Extending the adopted spec, each change should have a link to its corresponding pull request appended.
 
+## [9.4.0](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/compare/v9.3.0...v9.4.0) (2020-06-25)
+
+
+### Features
+
+* Add ASM install submodule ([#538](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/issues/538)) ([6ff27f9](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/commit/6ff27f9da146f8d0d37c8d536b863369bc82d4ab))
+* Add bool option for automount_service_account_token ([#571](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/issues/571)) ([002cfb1](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/commit/002cfb1a6f2214092adf066611b9be481d066b17))
+* Add firewall support safer-cluster modules ([#570](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/issues/570)) ([7ce3c49](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/commit/7ce3c497e4c6ddaf2da393d03d82b7f43ab329ee))
+
+
+### Bug Fixes
+
+* Enhance WI module usability with existing KSA ([#557](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/issues/557)) ([cf3273d](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/commit/cf3273df8428bfed36db76d54ec90aec022c55d5))
+* Restore gcloud wait_for_cluster ([#568](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/issues/568)) ([0bcf3ca](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/commit/0bcf3ca0dfebcdd99084d43eb6833bb7e55ae434))
+* Use gcloud module for scripts, closes [#401](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/issues/401) ([#404](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/issues/404)) ([65172de](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/commit/65172dea06923cb8f2771d06cba5e9ef2547d9da))
+
 ## [9.3.0](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/compare/v9.2.0...v9.3.0) (2020-06-11)