Removed trailing comma in skill.json

When using ask cli in Python 3.6 to deploy this code to the Developer Console, the trailing comma on line 14 causes an "invalid json" error. I've just removed that trailing comma to produce valid json.

Author: allenstetson

skill.json

@@ -11,7 +11,7 @@
             ],
             "keywords": [],
             "name": "Facts Sample w/In Skill Purchasing",
-            "description": "Sample Full Description",
+            "description": "Sample Full Description"
           }
         },
         "isAvailableWorldwide": true,
@@ -27,4 +27,4 @@
       },
       "manifestVersion": "1.0"
     }
-  }
+  }