fixed syntax error in diagram

Troubleshooting-issues-with-samples.md

@@ -35,7 +35,7 @@ Please note that warnings will rarely prevent the solution from working; We only
 graph TD
     A([Run npm install])
     A --> B{Errors?}
-    B --> |No|([Try gulp build])
+    B --> |No| Z([Try gulp build])
     B --> |Yes| C{Are you in root of project?} --> |No| D[Change directory to root of project] --> |Retry|A
     C --> |Yes| E{Running on Windows?} 
     E --> |Yes| F{Path too long?} --> |Yes| H[Move project to shorter path] --> |Retry|A