Merge pull request #57512 from bergerhoffer/OSDOCS-5336-rn

OSDOCS-5336: Release notes for PDB unhealthy eviction policy

release_notes/ocp-4-13-release-notes.adoc

@@ -436,6 +436,20 @@ The crun low-level container runtime is now generally available in {product-titl
 
 Linux Control Group version 2 (cgroup v2) is now generally available in {product-title} 4.13. There is no new functionality in the GA version.
 
+[id="ocp-4-13-pdb-eviction-policy"]
+==== Pod disruption budget (PDB) unhealthy pod eviction policy (Technology Preview)
+
+With this release, specifying an unhealthy pod eviction policy for pod disruption budgets (PDBs) is available as a Technology Preview feature. This can help evict malfunctioning applications during a node drain.
+
+To use this Technology Preview feature, you must enable the `TechPreviewNoUpgrade` feature set.
+
+[WARNING]
+====
+Enabling the `TechPreviewNoUpgrade` feature set on your cluster cannot be undone and prevents minor version updates. You should not enable this feature set on production clusters.
+====
+
+For more information, see xref:../nodes/pods/nodes-pods-configuring.adoc#pod-disruption-eviction-policy_nodes-pods-configuring[Specifying the eviction policy for unhealthy pods].
+
 [id="ocp-4-13-monitoring"]
 === Monitoring
 The monitoring stack for this release includes the following new and modified features.