Set path correctly

Author: nanashili

api/github/webhooks/index.js renamed to api/github/webhooks.js

@@ -1,6 +1,6 @@
 const { createNodeMiddleware, createProbot } = require("probot");
 
-const app = require('../../../app');
+const app = require("../../app");
 
 module.exports = createNodeMiddleware(app, {
   probot: createProbot(),