Update CHANGES.md

Author: jcohenadad

CHANGES.md

@@ -1,3 +1,9 @@
+## r20201001
+[View detailed changelog](https://github.com/spine-generic/data-multi-subject/compare/r20200917...r20201001)
+ - Create LICENSE.  [View pull request](https://github.com/spine-generic/data-multi-subject/pull/55)
+ - Update participants.tsv.  [View pull request](https://github.com/spine-generic/data-multi-subject/pull/53)
+ 
+
 ## r20200917
 [View detailed changelog](https://github.com/spine-generic/data-multi-subject/compare/r20200907...r20200917)