Please change the example username in the README screenshot

[chukfinley]

Description

Feature/Enhancement:
Update the example screenshot in the README to use a fictional username instead of hackerman1337.
Reason:
I own this username on Telegram and have been receiving unwanted messages from people testing the tool. So far I've had to block and report around 45 users because of this. I don't even respond anymore – I just block and report them immediately.
Using a clearly fictional example (e.g. test_user_example) would prevent this from happening to real users.

Sample:

Code of Conduct

• I agree to follow this project's Code of Conduct