Steps to Reproduce

1. Use ApplicationBuilder().http_version("2") to enable http2, as it said in the docs

Expected behaviour

Type-checkers accept literal '2'

Actual behaviour

Type-checker complains that Literal["1.1", "2.0"] was expected.

Operating System

Debian sid

Version of Python, python-telegram-bot & dependencies

python-telegram-bot 20.4
Bot API 6.7
Python 3.11.4 (main, Jun  7 2023, 10:13:09) [GCC 12.2.0]

Relevant log output

No response

Additional Context

In telegram._utils.types it defines HTTPVersion = Literal["1.1", "2.0"]. The correct one will be HTTPVersion = Literal["1.1", "2"].