docs(apim): Recommend SDP for SHGW image upgrades

Author: tomkerkhove

articles/api-management/self-hosted-gateway-support-policies.md

@@ -35,6 +35,9 @@ The following table shows Microsoft's responsibilities, shared responsibilities,
 
 We have the following tagging strategy for the [self-hosted gateway container image](self-hosted-gateway-overview.md#packaging), following the major, minor, patch convention: `{major}.{minor}.{patch}`. You can find a full list of [available tags](https://mcr.microsoft.com/product/azure-api-management/gateway/tags). As a best practice, we recommend that customers run the latest stable version of our container image. Given the continuous releases of our container image, we'll provide official support for the following versions: 
 
+> [!TIP]
+> We highly encourage customers to upgrade to a newer self-hosted gateway by following [Safe Deployment Practices (SDP)](validate-service-updates.md#what-is-the-azure-safe-deployment-practices-framework).
+
 ### Supported versions 
 
 * **Last major version and the last three minor releases**