Revert "Pin nightly toolchain for the time being"

[d-e-s-o]

This reverts commit 132f19d.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.80%. Comparing base (9d5f358) to head (01dc7ef).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1441   +/-   ##
=======================================
  Coverage   95.80%   95.80%           
=======================================
  Files          61       61           
  Lines       11114    11114           
=======================================
  Hits        10648    10648           
  Misses        466      466           

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