Upgrade caution to danger

doc/topics/autodevops/index.md

@@ -666,7 +666,7 @@ To use Auto Deploy on a Kubernetes 1.16+ cluster, you must:
    This will opt-in to using a version of the PostgreSQL chart that supports Kubernetes
    1.16 and higher.
 
-CAUTION: **Caution:** Opting into `AUTO_DEVOPS_POSTGRES_CHANNEL` version `2` will delete
+DANGER: **Danger:** Opting into `AUTO_DEVOPS_POSTGRES_CHANNEL` version `2` will delete
 the version `1` PostgreSQL database. Please backup the contents of the PostgreSQL database
 first before opting into version `2`, so that you can restore into the version `2` database.