ci: Lint workflows with zizmor

[larseggert]

And fix the issues

[github-advanced-security]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.71%. Comparing base (8329753) to head (f8a0948).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #85   +/-   ##
=======================================
  Coverage   86.71%   86.71%           
=======================================
  Files           5        5           
  Lines         557      557           
  Branches      557      557           
=======================================
  Hits          483      483           
  Misses         48       48           
  Partials       26       26           

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[mxinden]

Also needs mozilla/neqo#2418 ?