release 5.20.0 changelog (#17526)

* release 5.20.0 changelog

* Apply suggestions from code review

Co-authored-by: Stephen Lewis (Burrows) <stephenrlewis@google.com>

* Update CHANGELOG.md

---------

Co-authored-by: Stephen Lewis (Burrows) <stephenrlewis@google.com>

CHANGELOG.md

@@ -1,5 +1,19 @@
 ## 5.20.0 (Unreleased)
 
+FEATURES:
+* **New Resource:** `google_clouddeploy_custom_target_type_iam_*` ([#17445](https://github.com/hashicorp/terraform-provider-google/pull/17445))
+
+IMPROVEMENTS:
+* certificatemanager: added `type` field to `google_certificate_manager_dns_authorization` resource ([#17459](https://github.com/hashicorp/terraform-provider-google/pull/17459))
+* compute: added the `network_url` attribute to the `consumer_accept_list`-block of the `google_compute_service_attachment` resource ([#17492](https://github.com/hashicorp/terraform-provider-google/pull/17492))
+* gkehub: added support for `policycontroller.policy_controller_hub_config.policy_content.bundles` and 
+`policycontroller.policy_controller_hub_config.deployment_configs` fields to `google_gke_hub_feature_membership` ([#17483](https://github.com/hashicorp/terraform-provider-google/pull/17483))
+
+BUG FIXES:
+* artifactregistry: fixed permadiff when `google_artifact_repository.docker_config` field is unset ([#17484](https://github.com/hashicorp/terraform-provider-google/pull/17484))
+* bigquery: corrected plan-time validation on `google_bigquery_dataset.dataset_id` ([#17449](https://github.com/hashicorp/terraform-provider-google/pull/17449))
+* kms: fixed issue where `google_kms_crypto_key_version.attestation.cert_chains` properties were incorrectly set to type string ([#17486](https://github.com/hashicorp/terraform-provider-google/pull/17486))
+
 ## 5.19.0 (Mar 4, 2024)
 
 FEATURES: