docs: Update README.md (#7)

* docs: Update README.md

* Update README.md

Author: averikitsch

README.md

@@ -1,5 +1,8 @@
 # Gemini CLI Extension - Cloud SQL for PostgreSQL
 
+> [!NOTE]
+> This extension is currently in beta, and may see breaking changes until the first stable release (v1.0).
+
 This Gemini CLI extension provides a set of tools to interact with [Cloud SQL for PostgreSQL](https://cloud.google.com/sql/docs/postgres) instances. It allows you to manage your databases, execute queries, explore schemas, and troubleshoot issues directly from the [Gemini CLI](https://google-gemini.github.io/gemini-cli/), using natural language prompts.
 
 Learn more about [Gemini CLI Extensions](https://github.com/google-gemini/gemini-cli/blob/main/docs/extension.md).
@@ -15,7 +18,7 @@ Learn more about [Gemini CLI Extensions](https://github.com/google-gemini/gemini
 
 Before you begin, ensure you have the following:
 
-* [Gemini CLI](https://github.com/google-gemini/gemini-cli) installed.
+* [Gemini CLI](https://github.com/google-gemini/gemini-cli) installed with version +v0.6.0.
 * A Google Cloud project with the **Cloud SQL Admin API** enabled.
 * IAM Permissions:
   * Cloud SQL Client (`roles/cloudsql.client`)
@@ -41,6 +44,8 @@ Set the following environment variables before starting the Gemini CLI:
 * `CLOUD_SQL_POSTGRES_PASSWORD`: (Optional) The password for the database user.
 * `CLOUD_SQL_POSTGRES_IP_TYPE`: (Optional) The IP Type.
 
+Ensure [Application Default Credentials](https://cloud.google.com/docs/authentication/gcloud) are available in your environment.
+
 > [!NOTE]
 > When using private IPs with Cloud SQL for PostgreSQL, you must use a Virtual Private Cloud (VPC) network.