Update SageMath stack v9.0 -> v9.5

values.template.yaml

@@ -167,7 +167,7 @@ singleuser:
         nvidia.com/gpu: "4"
   - display_name: Stack SageMath
     kubespawner_override:
-      image_spec: sharptrick/sage-notebook
+      image_spec: gitlab-registry.nrp-nautilus.io/youngsu_kim/csusb-jupyter-stack/stack-sagemath:b353d66b
 scheduling:
   userScheduler:
     enabled: false