docs: fix code block titles (#5733)

* docs: fix code block titles

* remove console

* fix build error

www/apps/docs/content/plugins/notifications/slack.md

@@ -78,7 +78,7 @@ npm install medusa-plugin-slack-notification
 
 After that, open `medusa-config.js` and add the new plugin with its configurations in the `plugins` array:
 
-```js title=medusa-config.js
+```js title="medusa-config.js"
 const plugins = [
   // ...,
   {