adding release notes for passwordless auth in AWS and GCP

Author: tauhid621

content/terraform-enterprise/1.1.x/docs/enterprise/releases/1.1.x/index.mdx

@@ -72,6 +72,9 @@ Flexible Deployment Options `terraform-enterprise` container digest: amd64/linux
 ## Highlights
 1. PostgreSQL 17, Google Cloud AlloyDB 16, and EnterpriseDB Postgres Advanced Server 16 and 17 databases are now officially supported.
 1. You can now use the Terraform Enterprise admin console and API to manage support bundles, product usage bundles, and retrieve node information.
+1. You can now use AWS Identity and Access Management (IAM) to authenticate to Amazon RDS for PostgreSQL.
+1. You can now use Google Default Credentials to authenticate to Cloud SQL.
+1. You can now use AWS Identity and Access Management (IAM) to authenticate to Redis instance.
 
 ## Features
 1. You can now create multiple authentication tokens for a single team.