fix: remove NSP warning (#950)

remove NSP warning

This note is no longer needed. From https://learn.microsoft.com/en-us/azure/private-link/network-security-perimeter-concepts:

> Network security perimeter is now generally available in all Azure public cloud regions.

Co-authored-by: Jon Torre <[email protected]>

Author: ryepup

content/nginxaas-azure/quickstart/security-controls/certificates.md

@@ -164,8 +164,6 @@ For more information on using NGINX to secure traffic to upstream servers, refer
 
 If you want to disable public access to your key vault, you can configure a [Network Security Perimeter (NSP)](https://learn.microsoft.com/en-us/azure/private-link/network-security-perimeter-concepts). This will allow you to configure access rules to allow NGINXaaS to fetch certificates from your key vault while ensuring all other public access is denied.
 
-{{< call-out "note" >}} Network Security Perimeter is currently in public preview. Refer to [Azure's NSP documentation](https://learn.microsoft.com/en-us/azure/private-link/network-security-perimeter-concepts) for details on its current capabilities. {{< /call-out >}}
-
 1. Follow [Azure's documentation on prerequisites](https://learn.microsoft.com/en-us/azure/private-link/create-network-security-perimeter-portal#prerequisites) to ensure you are registed to create an NSP.
 1. In the Search box, enter **Network Security Perimeters** and select **Network Security Perimeters** from the search results.
 1. Select {{< fa "plus">}}**Create**.
@@ -198,4 +196,4 @@ By default, the key vault will be associated to the NSP in [Learning mode](https
 1. Select the `nginxaas-kv` resource association.
 1. Select **Change access mode**, set to **Enforced**, and select **Apply**.
 
-{{< call-out "note" >}} If you are using the Azure portal to add certificates, you will also need to add an inbound access rule to allow your IP address, so the portal can list the certificates in your key vault. {{< /call-out >}}
+{{< call-out "note" >}} If you are using the Azure portal to add certificates, you will also need to add an inbound access rule to allow your IP address, so the portal can list the certificates in your key vault. {{< /call-out >}}