Update README.md

README.md

 # UK Biobank QSM pipeline
 
-* `QSM.m`:  This script is the main QSM processing pipeline for UK Biobank swMRI data. `weightedCombination.m` and `phasevariance_nonlin.m` are supporting functions.
+* `BiobankQSM.m`:  This script is the main QSM processing pipeline for UK Biobank swMRI data. `weightedCombination.m` and `phasevariance_nonlin.m` are supporting functions.
 
 
 ## Requirements