Revise tutorial access instructions for clarity

Updated tutorial instructions to include Colab as an option for running Jupyter Notebooks and clarified access to the GitHub repository.

Author: eeholmes

book/presentations/tutorials.md

@@ -1,15 +1,10 @@
 # Tutorials
 
 Live recordings of the tutorial sessions will be linked here. Some tutorials include
-slides, and most have an accompanying Jupyter Notebooks that can be run in our
-{{ '[preconfigured software environment]({url})'.format(url=jupyterhub_url) }}
-If you are attending the hackweek, you have access to a JupyterHub environment
-with all the necessary Python software packages installed that are needed to run
-through these tutorials interactively. On the JupyterHub, your home directory persists
-so any changes you make to the tutorials will be saved and be there for you next
-time you log in.
+slides, and most have an accompanying Jupyter Notebooks that can be run in Colab (free, just requires Google account) or our
+JupyterHub with all the necessary Python software packages installed. 
 
-**How to run the tutorials?** You can either download and upload the tutorials (click download icon) or view the tutorial (click eye icon) and you will see options to open the tutorial in the JupyterHub or Colab. You can also go to the [tutorial GitHub repo](https://github.com/fish-pace/2025-tutorials) and clone that into the JupyterHub.
+**How to run the tutorials?** You can either download and upload the tutorials (click download icon) or view the tutorial (click eye icon) and you will see options to open the tutorial in the JupyterHub or Colab. You can also go to the [tutorial GitHub repo](https://github.com/fish-pace/2025-tutorials) and clone that into the JupyterHub or your local machine.
 
 | Title | Slides | Notebook {{ l1 }} | Notebook {{ d1 }} | Recording | Colab |
 | :---- | :----: | :------: | :-------: |  :-------: | :-------:|