fix: typo in derivatives spec for pybids
"sub-{subject}[/ses-{session}]/{datatype<dwi>|dwi}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_dir-{direction}][_rec-{reconstruction}][_run-{run}][_space-{space}][_res-{resolution}][_desc-{desc}]_{suffix<dwi|epiref|lowb|dseg>}.{extension<json|nii.gz|nii>|nii.gz}",
"sub-{subject}[/ses-{session}]/{datatype<dwi>|dwi}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_dir-{direction}][_rec-{reconstruction}][_run-{run}][_space-{space}][_res-{resolution}]_desc-{desc}_{suffix<mask>}.{extension<json|nii.gz|nii>|nii.gz}",
"sub-{subject}[/ses-{session}]/{datatype<dwi>|dwi}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_dir-{direction}][_rec-{reconstruction}][_run-{run}][_space-{space}][_res-{resolution}][_desc-{desc}]_{suffix<dwi>}.{extension<tsv|bval|bvec>|tsv}",
- "sub-{subject}[/ses-{session}]/{datatype<fmap>|fmap}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_dir-{direction}][_run-{run}][_space-{space}][_res-{resolution}][_desc-{desc}]_{fmap<fieldmap>}.{extension<nii|nii.gz|json>|nii.gz}"
+ "sub-{subject}[/ses-{session}]/{datatype<fmap>|fmap}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_dir-{direction}][_run-{run}][_space-{space}][_res-{resolution}][_desc-{desc}]_{suffix<fieldmap>}.{extension<nii|nii.gz|json>|nii.gz}"
]
}
\ No newline at end of file
