doc: Terraform Versioning Guidance (#1627)

* Terraform Versioning Guidance

* Update index.html.markdown

* Update README.md

* Update index.html.markdown

* Update index.html.markdown

* Update README.md

Author: Zuhairahmed

README.md

@@ -17,8 +17,8 @@ Bugs should be filed under the Issues section of this repo.
 Feature requests can be submitted at https://feedback.mongodb.com/forums/924145-atlas - just select the Terraform plugin as the category or vote for an already suggested feature.
 
 ## Requirements
-- [Terraform](https://www.terraform.io/downloads.html) 1.0+
-- [Go](https://golang.org/doc/install) 1.21 (to build the provider plugin)
+- [Terraform Version](https://www.terraform.io/downloads.html) While we support minimum of HashiCorp Terraform version 1.0+ (as we have migrated to [Plugin Protocol Version 6](https://developer.hashicorp.com/terraform/plugin/terraform-plugin-protocol#protocol-version-6)), for your safety we strongly recommend only consuming versions of Terraform that are currently receiving Security/Maintenance Updates. For latest Terraform versions see: https://endoflife.date/terraform 
+- [Go Version](https://golang.org/doc/install) 1.21 (to build the provider plugin)
 
 ## Using the Provider
 

website/docs/index.html.markdown

@@ -179,11 +179,14 @@ In addition to [generic `provider` arguments](https://www.terraform.io/docs/conf
 
 For more information on configuring and managing programmatic API Keys see the [MongoDB Atlas Documentation](https://docs.atlas.mongodb.com/tutorial/manage-programmatic-access/index.html).
 
-## Terraform Version Requirement
+## HashiCorp Terraform Version Requirement
 | MongoDB Atlas Provider version  | Required Terraform version |
 | ------------- | ------------- |
 | `1.12.0` and above  | `1.0+`  |
 | below `1.12.0`  | `0.13+` |
+
+* While we support minimum of HashiCorp Terraform version 1.0+ (as we have migrated to [Plugin Protocol Version 6](https://developer.hashicorp.com/terraform/plugin/terraform-plugin-protocol#protocol-version-6)), for your safety we strongly recommend only consuming versions of Terraform that are currently receiving Security/Maintenance Updates. For latest Terraform versions see: https://endoflife.date/terraform 
+
 ## Supported OS and Architectures
 As per [HashiCorp's recommendations](https://developer.hashicorp.com/terraform/registry/providers/os-arch), we fully support the following operating system / architecture combinations:
 - Darwin / AMD64