add note (#4)

Signed-off-by: Tom Hennen <tomhennen@google.com>

Author: TomHennen

README.md

@@ -24,4 +24,8 @@ Files
 * main.c - handles command line parameters and driving the rest of the program
 * display.c - handles displaying the information to the user
 * process.c - handles reading a file in to our data structure
-* state.c - handles basic management of the data structure
+* state.c - handles basic management of the data structure
+
+Notes
+-----
+This repo is now being used to test https://github.com/slsa-framework/slsa-source-poc.