Upgrade versions - k8s 1.31.2, jupyterhub 4.1.6

Upgrade k8s, system components, jupyterhub and security components.

cesnet-central/deployments/fullhub.yaml

@@ -39,6 +39,15 @@ singleuser:
     limit: 2
     guarantee: .02
   defaultUrl: "/lab"
+  networkPolicy:
+    egress:
+      - to:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: kube-system
+          serviceSelector:
+            matchLabels:
+              k8s-app: cluster-ingress
   image:
     name: eginotebooks/single-user-eosc
     tag: "sha-dea4fa2"