Add helper message

Author: l

test-sdc.sh

@@ -180,3 +180,5 @@ elif [[ "$1" == "implement-cowsay" ]]; then
 else
 	echo "Please run this with a valid test directory name as argument"
 fi
+
+echo "If you want to re-run the automated tests after changing some code, remove the 'Needs Review', wait a little, and then re-add the 'Needs Review' label on your PR."