Single thread build for runners

[sbryngelson]

Let's try only one thread

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.76%. Comparing base (72d4fef) to head (17c28df).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #891   +/-   ##
=======================================
  Coverage   45.76%   45.76%           
=======================================
  Files          68       68           
  Lines       18668    18668           
  Branches     2251     2251           
=======================================
  Hits         8543     8543           
  Misses       8767     8767           
  Partials     1358     1358           

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