Add at least one output to the start notebook

[senecameeks]

The tensorflow import tool will skip trying to run any notebook that has any output, and instead publishes the notebook as is to the website. This includes a print of a simple circuit to get around the import tool.

[review-notebook-app]

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[senecameeks]

To clarify-- currently the import tool tries to execute the notebook since there is no output and fails (the engine api isn't enabled to run for the tensorflow-testing project). When it fails, the notebook isn't published to the website
If there is any output included (what the PR does and what we want), the import tool will skip trying to execute the notebook and publish it as is.

[verult]

Thanks!

[senecameeks]

cc: @MichaelBroughton , my comment above might be helpful for future attempts to import notebooks to the website.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (b5b3b74) 97.84% compared to head (21f6d1c) 97.84%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6360   +/-   ##
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  Coverage   97.84%   97.84%           
=======================================
  Files        1110     1110           
  Lines       96690    96690           
=======================================
  Hits        94606    94606           
  Misses       2084     2084           

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