use info callout for region availability

Author: atierian

src/pages/[platform]/ai/concepts/models/index.mdx

@@ -51,7 +51,9 @@ When you use the Amplify AI Kit, inference requests are charged to your AWS acco
 
 Always refer to [Bedrock pricing](https://aws.amazon.com/bedrock/pricing/) for the most up-to-date information on running generative AI with Amplify AI Kit.
 
-Your Amplify project must be deployed to a region where the foundation model you specify is available. See [Bedrock model support](https://docs.aws.amazon.com/bedrock/latest/userguide/models-supported.html) for the supported regions per model.
+<Callout type="info">
+  Your Amplify project must be deployed to a region where the foundation model you specify is available. See [Bedrock model support](https://docs.aws.amazon.com/bedrock/latest/userguide/models-supported.html) for the supported regions per model.
+</Callout>
 
 ## Supported Providers and Models