Update doxygen main page

include/tgbot/tgbot.h

@@ -134,13 +134,10 @@
  * You can use Docker to build and run your bot. Set the base image of your's Dockerfile to [reo7sp/tgbot-cpp](https://hub.docker.com/r/reo7sp/tgbot-cpp/).
  *
  * @section Samples
- * All samples are located [here](https://github.com/reo7sp/tgbot-cpp/tree/master/samples)
- *
- * @section Feedback
- * Feel free to [create new issues on GitHub](https://github.com/reo7sp/tgbot-cpp/issues) or [contact me on Telegram](https://t.me/reo7sp)
+ * All samples are located [here](https://github.com/reo7sp/tgbot-cpp/tree/master/samples).
  *
  * @section Licence
- * [The MIT License](http://opensource.org/licenses/MIT)
+ * [The MIT License](https://github.com/reo7sp/tgbot-cpp/blob/master/LICENSE).
  */
 
 #endif //TGBOT_TGBOT_H