Update conversion gallery to new parameters

[h-mayorquin]

This removes the save_path argument that is going to be deprecated in favor of the new nwbfile_path standard.

[codecov[bot]]

Codecov Report

Merging #565 (330d7fb) into main (8959b11) will decrease coverage by 0.25%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #565      +/-   ##
==========================================
- Coverage   88.32%   88.07%   -0.26%     
==========================================
  Files          59       59              
  Lines        3135     3135              
==========================================
- Hits         2769     2761       -8     
- Misses        366      374       +8     

Flag	Coverage Δ
unittests	88.07% <ø> (-0.26%)	:arrow_down:

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Impacted Files	Coverage Δ
...rsion_tools/tools/spikeinterface/spikeinterface.py	84.16% <0.00%> (-1.55%)	:arrow_down: