[lis, *] Bump image tag (#7087)

* feat: enable 15Gi size limit on emptyDir

* docs: add note about reclaiming storage

* feat: bump lis image tag

Author: agoose77

config/clusters/2i2c-uk/lis.values.yaml

@@ -57,7 +57,7 @@ jupyterhub:
     image:
       # https://hub.docker.com/r/lisacuk/lishub-base
       name: lisacuk/lishub-base
-      tag: a57e973
+      tag: efb1c51
     defaultUrl: /lab
     profileList:
       # Setup as requested in https://2i2c.freshdesk.com/a/tickets/1348