Merge branch 'opentelemetry' of https://github.com/tomkerkhove/azure-docs-pr into opentelemetry

Author: tomkerkhove

articles/api-management/includes/preview/preview-callout-self-hosted-gateway-opentelemetry.md

@@ -7,4 +7,4 @@ ms.date: 12/17/2021
 ---
 
 > [!IMPORTANT]
-> OpenTelemetry support for Azure API Management self-hosted gateway is currently in preview and requires `2.0.0-preview-5` tag or higher.
+> OpenTelemetry support for Azure API Management self-hosted gateway is currently in preview and requires `2.0.0-preview-6` tag or higher.