update action/checkout

[orbeckst]

fix #416

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.78%. Comparing base (8a361d5) to head (819e1f7).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #417   +/-   ##
=======================================
  Coverage   98.78%   98.78%           
=======================================
  Files          28       28           
  Lines        1978     1978           
  Branches      435      435           
=======================================
  Hits         1954     1954           
  Misses          2        2           
  Partials       22       22           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[orbeckst]

The windows issue seems unrelated (raised #418 for it) so I will merge.