Upgrade versions - k8s 1.31.2, jupyterhub 4.1.6

Upgrade k8s, system components, jupyterhub and security components.

cesnet-central/deployments/fullhub.yaml

@@ -167,9 +167,11 @@ hub:
       display: false
       api_token: "{{ secrets['zabbix_token'] }}"
   # recommended to keep in sync with common/playbooks/files/jupyterhub-jwt.yaml
+  # keep k8s-hub version in sync with ../playbooks/notebooks.yaml
   image:
     name: eginotebooks/hub
-    tag: "sha-2fa0db6"
+    # k8s-hub 3.3.8
+    tag: "sha-f5af1a3"
   config:
     Authenticator:
       enable_auth_state: true