Replace Admonition Style (cloudposse/terraform-aws-components#1092)

Co-authored-by: Erik Osterman (CEO @ Cloud Posse) <[email protected]>

Author: milldr

src/README.md

@@ -105,12 +105,10 @@ for `<integration name>.yaml`.
 
 #### Sample Yaml
 
-:::caution
-
-The key of a filename must match datadog docs, which is `<INTEGRATION_NAME>.yaml`
-[Datadog Cluster Checks](https://docs.datadoghq.com/agent/cluster_agent/clusterchecks/?tab=helm#configuration-from-static-configuration-files)
-
-:::
+> [!WARNING]
+>
+> The key of a filename must match datadog docs, which is `<INTEGRATION_NAME>.yaml` >
+> [Datadog Cluster Checks](https://docs.datadoghq.com/agent/cluster_agent/clusterchecks/?tab=helm#configuration-from-static-configuration-files)
 
 Cluster Checks **can** be used for external URL testing (loadbalancer endpoints), whereas annotations **must** be used
 for kubernetes services.