Fix typo in comment

Author: DSteve595

android-studio-3/checks/src/main/java/com/example/lint/checks/SampleCodeDetector.java

@@ -67,7 +67,7 @@ public List<Class<? extends UElement>> getApplicableUastTypes() {
 
     @Override
     public UElementHandler createUastHandler(JavaContext context) {
-        // Not: Visiting UAST nodes is a pretty general purpose mechanism;
+        // Note: Visiting UAST nodes is a pretty general purpose mechanism;
         // Lint has specialized support to do common things like "visit every class
         // that extends a given super class or implements a given interface", and
         // "visit every call site that calls a method by a given name" etc.