Fix ngFor snippet template variable

Author: fsievers

snippets/html.cson

@@ -11,7 +11,7 @@
     'description': 'Angular 2 *ngFor snippet'
     'descriptionMoreURL': 'https://angular.io/docs/ts/latest/api/common/NgFor-directive.html'
     'body': """
-    *ngFor="let {1:$item} of ${2:list}"
+    *ngFor="let ${1:item} of ${2:list}"
     """
   'ngIf':
     'prefix': 'ng2-ngIf'