fix(ci): adapt workflow to use supported npm versions

[pichlermarc]

Which problem is this PR solving?

• limit to npm@<11 on Node 18 as [email protected] dropped support for it via the engines field (README.md is not updated yet)
• Updates benchmark workflow to latest LTS Node.js version
• Updates Windows tests to run on Node.js v20

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.66%. Comparing base (84cce75) to head (41a1ef3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5277      +/-   ##
==========================================
- Coverage   94.67%   94.66%   -0.02%     
==========================================
  Files         322      322              
  Lines        8058     8058              
  Branches     1632     1632              
==========================================
- Hits         7629     7628       -1     
- Misses        429      430       +1     

see 1 file with indirect coverage changes