[CLI/PS] KeyVault API versions before 2026-02-01 will be retired- Reference doc reminder message

Warning: Azure Key Vault API versions earlier than 2026-02-01 are being retired.

**Azure CLI Reference Documentation Warning**
Proposed Warning Message

Warning

Azure Key Vault API versions earlier than 2026-02-01 are scheduled for retirement and may stop working after the retirement date.

Support for Key Vault API version 2026-02-01 was introduced in Azure CLI 2.90.0. We strongly recommend upgrading to Azure CLI 2.90.0 or later and migrating to API version 2026-02-01 or later as soon as possible.

For supported versions and migration guidance, see:

Supported API versions: https://review.learn.microsoft.com/en-us/azure/key-vault/general/access-control-default?branch=main&branchFallbackFrom=pr-en-us-2074&tabs=azure-cli

**Azure PowerShell Reference Documentation Warning**
Proposed Warning Message

Warning

Azure Key Vault API versions earlier than 2026-02-01 are scheduled for retirement and may stop working after the retirement date.

Support for Key Vault API version 2026-02-01 was introduced in Azure PowerShell 16.3.0. We strongly recommend upgrading to Azure PowerShell 16.3.0 or later and migrating to API version 2026-02-01 or later as soon as possible.

For supported versions and migration guidance, see:

Supported API versions: https://review.learn.microsoft.com/en-us/azure/key-vault/general/access-control-default?branch=main&branchFallbackFrom=pr-en-us-2074&tabs=azure-cli