Change ScatteredTransform repository

The ScatteredTransform extension is not currently being maintained, switch the repo to a fork of the original repo.
Once maintenance resumes, or the repository is migrated to another organization (Slicer), we can switch to the original/new repo.

ScatteredTransform.s4ext

@@ -6,7 +6,7 @@
 
 # This is source code manager
 scm git
-scmurl https://github.com/grandwork2/ScatteredTransform
+scmurl https://github.com/Sunderlandkyl/ScatteredTransform
 scmrevision master
 
 # list dependencies