Cleanup: add missing trailing comma

This comma isn't strictly necessary, but makes the diff cleaner when adding
new functions.

web/app/src/components/TasksTable.vue

@@ -190,7 +190,7 @@ export default {
 
       let tableHeight = jobDetailsColumn.clientHeight - taskListTable.offsetTop;
       this.tabulator.setHeight(tableHeight);
-    }
+    },
   }
 };