added posibility to handle exception on RequestTimeout

[TheWCKD]

Description

I wanted to increment an error counter whenever the RequestTimeout occurs as an exception via the exception_handler class

Describe your tests

How did you test your change?

Tested on my own project in which I frequently use telebot

Python version: 3.11

OS: Linux Mint

Checklist:

• I added/edited example on new feature/change (if exists)
• My changes won't break backward compatibility
• I made changes both for sync and async

[Badiboy]

@coder2020official Moved from sync version.

[coder2020official]

Will get back soon

[coder2020official]

Thanks