cloud: update TiDB Cloud Dedicated Azure support info (#22834)

Author: qiancai

tidb-cloud/create-tidb-cluster.md

@@ -40,7 +40,6 @@ If you are in the `Organization Owner` or the `Project Owner` role, you can crea
 
         > **Note:**
         >
-        > - Currently, the support of TiDB Cloud Dedicated on Azure is in public preview.
         > - If you signed up for TiDB Cloud through [AWS Marketplace](https://aws.amazon.com/marketplace), the cloud provider is AWS, and you cannot change it in TiDB Cloud.
         > - If you signed up for TiDB Cloud through [Azure Marketplace](https://azuremarketplace.microsoft.com), the cloud provider is Azure Cloud, and you cannot change it in TiDB Cloud.
         > - If you signed up for TiDB Cloud through [Google Cloud Marketplace](https://console.cloud.google.com/marketplace), the cloud provider is Google Cloud, and you cannot change it in TiDB Cloud.

tidb-cloud/tidb-cloud-intro.md

@@ -122,7 +122,7 @@ TiDB Cloud provides the following deployment options:
 
     TiDB Cloud Dedicated is designed for mission-critical businesses, offering high availability across multiple availability zones, horizontal scaling, and full [HTAP](https://en.wikipedia.org/wiki/Hybrid_transactional/analytical_processing) capabilities.
 
-    Currently, TiDB Cloud Dedicated is generally available on AWS and Google Cloud, and in public preview on Azure. For more information, see [TiDB Cloud Dedicated](https://www.pingcap.com/tidb-cloud-dedicated).
+    Currently, TiDB Cloud Dedicated is generally available on AWS, Azure, and Google Cloud. For more information, see [TiDB Cloud Dedicated](https://www.pingcap.com/tidb-cloud-dedicated).
 
 ## Architecture