Use base pipes

[peterdesmet]

Now that we have R >= 4.1.0 we can use base pipes in our tutorials.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (4090f5a) to head (d87d409).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #292   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           23        23           
  Lines          650       650           
=========================================
  Hits           650       650           

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