docs: add note about version constraint for PXK-E 1.31.1 (#5219)

* docs: add note about version constraint for PXK-E 1.31.1

* docs: fix typo

* Update docs/docs-content/release-notes/release-notes.md

* docs: add cross link

* docs: pack notes section

* Update docs/docs-content/release-notes/release-notes.md

docs/docs-content/release-notes/release-notes.md

@@ -145,6 +145,15 @@ tags: ["release-notes"]
 
 ### Packs
 
+#### Pack Notes
+
+- If you want to use PXK-E version 1.31.1, ensure that your Palette agent version is greater than 4.5.11, which
+  corresponds to Palette version 4.5.15. If you are using a connected Edge host, the Palette agent version will update
+  itself automatically if your Palette environment is 4.5.15 or later unless you
+  [paused platform upgrades](../clusters/cluster-management/platform-settings/pause-platform-upgrades.md). For airgap
+  clusters, refer to [Update Palette Agent Version](../clusters/edge/cluster-management/agent-upgrade-airgap.md) to
+  update the agent version manually.
+
 #### Kubernetes
 
 | Pack Name                                | New Version |