BF(DOC): use a BIDS compliant _mask instead of old BEP03 _roi to point to lesion mask

[yarikoptic]

Not sure if the specific name is the best one, since does not point explicitly to T1w as the orig of that mask, and either label should may be made extended instead of abbreviated L.

But in either case, old doc example is clearly wrong thus this fix

Attn @michael-sun

[effigies]

Before we can update the docs, we need to accept the standard ROI masks.

[yarikoptic]

oh, right... I have tried to spot which code is relying on those _roi files but failed to find any.

[codecov-commenter]

Codecov Report

Merging #2715 (940d7e1) into master (7dcf0eb) will not change coverage. The diff coverage is n/a.

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  Files          44       44           
  Lines        3270     3270           
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  Hits         1525     1525           
  Misses       1745     1745           

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[effigies]

It's in smriprep. Apologies for the web of dependencies; the idea is to make identical anatomical preprocessing available to dmriprep or aslprep or whatevercomesnextprep.

[effigies]

Docs are being updated to match behavior in #2943. They will be updated again when behavior conforms to BIDS Derivatives spec, targeting 23.1.0.