update issue template

Author: streamtw

.github/ISSUE_TEMPLATE.md

@@ -2,7 +2,9 @@ Please check the following instructions before submitting a bug :
  * Make sure you are using the latest version.
  * Make sure you read [installation](http://unisharp.github.io/laravel-filemanager/installation), [integration](http://unisharp.github.io/laravel-filemanager/integration), and [upgrade](http://unisharp.github.io/laravel-filemanager/upgrade) document.
 
-If your problem still remains, please do these steps :
- * Run `php ./vendor/unisharp/laravel-filemanager/bin/debug` and paste the results here.
- * Capture screenshots of your browser console and paste them here.
- * Provide the steps to reproduce your issue, so we might solve it quicker.
+And provide the followings :
+ * Operating system :
+ * Laravel version :
+ * Package version :
+ * Steps to reproduce your issue :
+ * Screenshots of browser console :