Update uninstalling-che.adoc

Author: ibuziuk

modules/administration-guide/pages/uninstalling-che.adoc

@@ -31,3 +31,8 @@ The `--delete-namespace` option removes the {prod-short} namespace.
 
 The `--delete-all` option removes the {devworkspace} Operator and the related resources.
 ====
+
+[IMPORTANT]
+====
+Standard operating procedure (SOP) for removing {devworkspace} Operator manually without `{orch-cli}` can be found in the OpenShift Container Platform link:https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html/web_console/web-terminal#removing-devworkspace-operator_uninstalling-web-terminal[official documentation].
+====