Update cnf-best-practices-expectations-permissions.adoc

Author: mwlinca

modules/cnf-best-practices-expectations-permissions.adoc

@@ -203,6 +203,8 @@ Pods should exit with zero exit codes when they are gracefully terminated.
 [IMPORTANT]
 ====
 All pods must respond to SIGTERM signal and shutdown gracefully with a zero exit code.
+
+See test case link:https://github.com/test-network-function/cnf-certification-test/blob/main/CATALOG.md#lifecycle-container-shutdown[lifecycle-container-shutdown]
 ====
 
 [id="cnf-best-practices-pod-resource-profiles"]