chore(docs): Add reference to avoid concurrent infra provisioning requests in Azure Service Bus guide

Author: leggetter

docs/pages/guides/service-bus-internal-mq.mdx

@@ -176,3 +176,5 @@ This error can happen due to a race condition of multiple Outpost instances tryi
 
 1. Run the services one at a time to ensure only one instance is creating the topic.
 2. Run the services again often resolves the issue as the topic may have been created by another instance.
+
+Also see [Avoid concurrent infra provisioning requests](https://github.com/hookdeck/outpost/issues/427).