Add release note for package refresh

Author: MoteHue

releasenotes/notes/release-train-02-2023-package-refresh-9de8049f8cb08a5e.yaml

@@ -0,0 +1,16 @@
+---
+features:
+  - |
+    The package repositories have been refreshed. Key packages to note are:
+    * Kernel
+      * version: 4.18.0
+      * release: 408.el8
+    * Libvirt
+      * version: 7.6.0
+      * release: 6.el8s
+    * OVS
+      * version: 2.17.0
+      * release: 31.el8s
+    * OVN
+      * version: 22.06.0
+      * release: 24.el8s