Update README.md

Author: vadimkantorov

data/common/README.md

@@ -1,3 +1,5 @@
 This is a directory for the downloaded datasets and models.
 
-Instructions for downloading prerequisite data are at https://github.com/vadimkantorov/contextlocnet/blob/master/README.md (steps 3-6).
+Instructions for downloading prerequisite data are at https://github.com/vadimkantorov/contextlocnet/blob/master/README.md (step 3).
+
+Links are in the [Makefile](https://github.com/vadimkantorov/contextlocnet/blob/master/data/common/Makefile).