Fix afni reference

Author: oesteban

fmriprep/data/boilerplate.bib

@@ -282,7 +282,7 @@ @article{fs_template
     year = 2010
 }
 
-@article{cox_software_1997,
+@article{afni,
     author = {Cox, Robert W. and Hyde, James S.},
     doi = {10.1002/(SICI)1099-1492(199706/08)10:4/5<171::AID-NBM453>3.0.CO;2-L},
     journal = {NMR in Biomedicine},
@@ -291,4 +291,4 @@ @article{cox_software_1997
     title = {Software tools for analysis and visualization of fMRI data},
     volume = 10,
     year = 1997
-}
+}