Update docs/pod-sandbox-lifecycle.md

Co-authored-by: Mike Brown <brownwm@us.ibm.com>
Signed-off-by: Antonio Ojea <antonio.ojea.garcia@gmail.com>

Author: aojea

docs/pod-sandbox-lifecycle.md

@@ -54,7 +54,7 @@ Plugins should treat this as an initialization phase. The sandbox infrastructure
 
 ## StopPodSandbox
 
-**CRI Operation**: StopPodSandbox - Stops any running process that is part of the sandbox and reclaims network resources.
+**CRI Operation**: StopPodSandbox - Stops any running process that is part of the sandbox and reclaims certain pod resources (e.g. Network Namespace, CNI teardown, and image mounts).
 
 **NRI Event Timing**: The StopPodSandbox NRI event is fired when the runtime initiates the CRI StopPodSandbox operation.