Adapt to new TopoNetX import convention

[ffl096]

See pyt-team/TopoNetX#361.

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 97.37%. Comparing base (242dd60) to head (27b0fc9). Report is 19 commits behind head on main.

Additional details and impacted files

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##             main     #280   +/-   ##
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  Coverage   97.37%   97.37%           
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  Files          58       58           
  Lines        2059     2059           
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  Hits         2005     2005           
  Misses         54       54           

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