Merge pull request #227029 from hhunter-ms/hh-63554

[Dapr/ACA] Add limitation re alpha APIs

Author: prmerger-automator[bot]

articles/container-apps/dapr-overview.md

@@ -40,6 +40,9 @@ This guide provides insight into core Dapr concepts and details regarding the Da
 | [**Observability**](./observability.md)               | Send tracing information to an Application Insights backend.                                                                                                    |
 | [**Secrets**][dapr-secrets]                           | Access secrets from your application code or reference secure values in your Dapr components.                                                                   |
 
+> [!NOTE]
+> The above table covers stable Dapr APIs. To learn more about using alpha APIs and components, [see limitations](#unsupported-dapr-capabilities).
+
 ## Dapr concepts overview
 
 The following example based on the Pub/sub API is used to illustrate core concepts related to Dapr in Azure Container Apps.
@@ -339,6 +342,7 @@ This resource defines a Dapr component called `dapr-pubsub` via ARM.
 - **Dapr Configuration spec**: Any capabilities that require use of the Dapr configuration spec.
 - **Declarative pub/sub subscriptions**
 - **Any Dapr sidecar annotations not listed above**
+- **Alpha APIs and components**: Dapr alpha APIs and components are available to use on a self-service, opt-in basis. Alpha APIs and components are provided "as is" and "as available," and are continually evolving as they move toward stable status. Alpha APIs and components are not covered by customer support.
 
 ### Known limitations