chore(ci): update github workflow actions to latest versions

[phil-davis]

this gives a chance to confirm that CI is still passing using the current releases of the dev tools used in CI.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.77%. Comparing base (6ab6543) to head (1d9abbe).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #306      +/-   ##
============================================
+ Coverage     96.71%   96.77%   +0.05%     
  Complexity      117      117              
============================================
  Files            13       13              
  Lines           487      496       +9     
============================================
+ Hits            471      480       +9     
  Misses           16       16              

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