small typo in Makefile

the makefile linting stage was pointing to an incorrect folder - small change made to the foldername in the makefile linting stage

Author: bkocis

Lesson-2-Docker-format-containers/class-demos/Makefile

@@ -18,7 +18,7 @@ run-circleci-local:
 	circleci local execute
 
 lint:
-	hadolint demos/flask-sklearn/Dockerfile
+	hadolint demos/flask-sklearn-student-starter/Dockerfile
 	pylint --disable=R,C,W1203 demos/**/**.py
 
 all: install lint test