Index aslcontext rows with "cbf", not "CBF"

[tsalo]

Closes None.

Changes proposed in this pull request

• In sections where the aslcontext file is indexed to find CBF volumes, the code originally looked for "CBF", but the BIDS spec only allows "cbf".

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (6a231e1) 50.94% compared to head (b58e388) 50.94%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #252   +/-   ##
=======================================
  Coverage   50.94%   50.94%           
=======================================
  Files         132      132           
  Lines       12595    12595           
=======================================
  Hits         6417     6417           
  Misses       6178     6178           

Impacted Files	Coverage Δ
aslprep/interfaces/cbf_computation.py	83.55% <100.00%> (ø)
aslprep/interfaces/ge.py	62.22% <100.00%> (ø)
aslprep/workflows/asl/cbf.py	83.43% <100.00%> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.