fix(samples): updating both json files. (#540)

* fix(samples): updating both json files.

* pr fix: fixed test.

* 🦉 Updates from OwlBot post-processor

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Author: dfirova

retail/interactive-tutorials/src/main/java/events/setup/UpdateUserEventsJson.java

@@ -29,10 +29,10 @@
 public class UpdateUserEventsJson {
 
   public static void main(String[] args) throws IOException {
-    // TODO(developer): Replace these variables before running the sample.
     String filePath = "src/main/resources/user_events.json";
-
+    String invalidFilePath = "src/main/resources/user_events_some_invalid.json";
     updateEventsTimestamp(filePath);
+    updateEventsTimestamp(invalidFilePath);
   }
 
   public static void updateEventsTimestamp(String jsonFile) throws IOException {