adding deprecation notice

website/docs/index.html.markdown

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 Terraform Nutanix Provider leverages the community-supported model. See [Open Source Support](https://portal.nutanix.com/page/documents/kbs/details?targetId=kA07V000000LdWPSA0) for more information about its support policy.
 
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+-> **Nutanix Deprecation Announcement** Important Notice: Upcoming Deprecation of Legacy Nutanix Terraform Provider Resources. Starting with the Nutanix Terraform Provider release planned for Q4-CY2026, legacy resources which are based on v0.8,v1,v2 and v3 APIs will be deprecated and no longer supported. For more information, visit [Legacy API Deprecation Announcement](https://portal.nutanix.com/page/documents/eol/list?type=announcement) [Legacy API Deprecation - FAQs](https://portal.nutanix.com/page/documents/kbs/details?targetId=kA0VO0000005rgP0AQ). Nutanix strongly encourages you to migrate your scripts and applications to the latest v2 version of the Nutanix Terraform Provider resources, which are built on our v4 APIs/SDKs. By adopting the latest v2 version based on v4 APIs and SDKs, our users can leverage the enhanced capabilities and latest innovations from Nutanix. We understand that this transition may require some effort, and we are committed to supporting you throughout the process. Please refer to our documentation and support channels for guidance and assistance.
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 ## Example Usage
 
 ### Terraform 0.12 and below