Add the SkyH5 memo pdf to the repo

[bhazelton]

Description

I forgot to add the SkyH5 memo pdf to the repo in #220. This just adds the missing pdf.

Motivation and Context

Checklists:

Documentation Change Checklist:

• I have read the contribution guide.
• My code follows the code style of this project.
  Documentation change checklist:
• Any updated docstrings use the numpy docstring format.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (362e792) 100.00% compared to head (18c720d) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #229   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            5         5           
  Lines         2129      2129           
  Branches       606       606           
=========================================
  Hits          2129      2129           

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