Update README.md

Adding a warning to the README about the need to use a recent version of the provider for private endpoints to avoid a recently discovered bug in older versions.

README.md

@@ -8,10 +8,10 @@
 
 For information on developing `terraform-provider-cockroach` see [DEVELOPMENT.md](DEVELOPMENT.md).
 
-**Note: This is a preview release, suitable only for experimental use.**
-
 ## Get Started
 
+** If you intend to use this provider to provision [private endpoints]([url](https://github.com/cockroachdb/terraform-provider-cockroach/blob/main/docs/resources/private_endpoint_connection.md)) (AWS PrivateLink, GCP Private Service Connect, Azure Private Link) you must upgrade to [version 1.7.6]([url](https://github.com/cockroachdb/terraform-provider-cockroach/releases/tag/v1.7.6)) or later. **
+
 ### Prerequisites
 
 Before you use `terraform-provider-cockroach` you must [install Terraform](https://learn.hashicorp.com/tutorials/terraform/install-cli) and [`git`](https://git-scm.com/downloads) on your local machine.