Update 01-cluster.md

_episodes/01-cluster.md

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+![NeSI-HPC-Facility](https://github.com/user-attachments/assets/e9e6eda6-b1c7-4f55-84c0-965b9ac3ccd7)---
 title: "Working on a remote HPC system"
 # teaching: 10
 teaching: 20
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 *Cluster* is a more specific term describing a type of supercomputer comprised of multiple smaller computers (nodes) working together. Almost all supercomputers are clusters.
 
+![NeSI-HPC-Facility](https://github.com/user-attachments/assets/fb2ca699-9c94-440c-a2e3-eeb2086eed31)
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 ## Access
 
 You will connect to a cluster over the internet either with a web client (Jupyter) or with SSH (**S**ecure **Sh**ell). Your main interface with the cluster will be using command line.