tests: remove dependence on root folder name

[erooke]

test_reduce_node_name assumes the root directory of the source code is called pytask. This may not be true for a variety of reasons.

Changes

Replaces the string pytask with __ROOT.name in the expected output for test_reduce_node_name.

Todo

• Reference issues which can be closed due to this PR with "Closes #x".
• Review whether the documentation needs to be updated.
• Document PR in docs/changes.rst.

I could not find the file docs/changes.rst

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.50%. Comparing base (ad3680e) to head (76eac35).
Report is 71 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #620      +/-   ##
==========================================
- Coverage   97.80%   97.50%   -0.31%     
==========================================
  Files         106      111       +5     
  Lines        8710     9257     +547     
==========================================
+ Hits         8519     9026     +507     
- Misses        191      231      +40     

Flag	Coverage Δ
end_to_end	84.61% <ø> (+2.34%)	⬆️
integration	40.75% <ø> (+0.26%)	⬆️
unit	65.65% <ø> (-4.04%)	⬇️

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[tobiasraabe]

@erooke, thanks a lot!