Prevent docs upload failure in repo forks

[parker-research]

The docs.yml GitHub Action always fails in forked repos. It would be awesome if you could add this so that updating forks doesn't cause an Action failure right away.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.74%. Comparing base (b4a74b0) to head (ec49886).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1241   +/-   ##
=======================================
  Coverage   94.74%   94.74%           
=======================================
  Files         205      205           
  Lines       51218    51218           
=======================================
  Hits        48524    48524           
  Misses       2694     2694           

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