allow ci to continue on error for newest nightly

[YeungOnion]

• ci: continue past errors of true nightly for coverage

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.94%. Comparing base (a40ba07) to head (8c75906).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #291   +/-   ##
=======================================
  Coverage   93.94%   93.94%           
=======================================
  Files          52       52           
  Lines       11783    11783           
=======================================
  Hits        11070    11070           
  Misses        713      713           

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[YeungOnion]

this should be completely resilient against future issues with nightly and we can pin different nightlies that work for us.

I'd like the red x at the PR level to go away, but perhaps this will change sometime (see actions/runner#2347)

[FreezyLemon]

This is probably the best solution 👍 Feels bad to have CI fail just because of a broken nightly