Add missing closing '}' to indices.stats.json

rest-api-spec/api/indices.stats.json

@@ -42,7 +42,8 @@
           "type" : "list",
           "description" : "A comma-separated list of document types for the `indexing` index metric"
         }
-    },
-    "body": null
+      },
+      "body": null
+    }
   }
 }