Add introduction of Alpha feature EvenPodsSpread

Signed-off-by: Sascha Grunert <sgrunert@suse.com>

content/en/docs/setup/release/notes.md

@@ -250,6 +250,7 @@ The main themes of this release are:
 - Introduction of the pod overhead feature to the scheduler. This functionality is alpha-level as of
   Kubernetes v1.16, and is only honored by servers that enable the PodOverhead feature.gate. ([#78319](https://github.com/kubernetes/kubernetes/pull/78319), [@egernst](https://github.com/egernst))
 - Ephemeral containers have been added in alpha. These temporary containers can be added to running pods for purposes such as debugging, similar to how `kubectl exec` runs a process in an existing container. Also like `kubectl exec`, no resources are reserved for ephemeral containers and they are not restarted when they exit. Note that container namespace targeting is not yet implemented, so [process namespace sharing](https://kubernetes.io/docs/tasks/configure-pod-container/share-process-namespace/) must be enabled to view process from other containers in the pod. ([#59484](https://github.com/kubernetes/kubernetes/pull/59484), [@verb](https://github.com/verb))
+- Pod spread constraints have been added in alpha. You can use these constraints to control how Pods are spread across the cluster among failure-domains. ([#77327](https://github.com/kubernetes/kubernetes/pull/77327), [#77760](https://github.com/kubernetes/kubernetes/pull/77760), [#77828](https://github.com/kubernetes/kubernetes/pull/77828), [#79062](https://github.com/kubernetes/kubernetes/pull/79062), [#80011](https://github.com/kubernetes/kubernetes/pull/80011), [#81068](https://github.com/kubernetes/kubernetes/pull/81068), [@Huang-Wei](https://github.com/Huang-Wei))
 
 ### CLI Improvements