Add link in deployments doc to container probes

docs/user-guide/deployments.md

@@ -375,6 +375,7 @@ at any time during the update is at most 130% of desired pods.
 minimum number of seconds for which a newly created pod should be ready
 without any of its containers crashing, for it to be considered available.
 This defaults to 0 (the pod will be considered available as soon as it is ready).
+To learn more about when a pod is considered ready, see [Container Probes](pod-states.md#container-probes).
 
 ## Alternative to Deployments