Update requirements.txt - add missing typing-extensions

[smg-ca]

Add missing typing-extensions python module which is used here:

https://github.com/linuxmuster/linuxmuster-api/blob/lmn73/usr/lib/python3/dist-packages/linuxmusterApi/security/basic_auth.py#L7

[kiarn]

Hello @smg-ca,

Thank you for your contribution, but typing-extensions is already a dependency of fastapi:

$ pip show fastapi
Name: fastapi
Version: 0.116.1
Summary: FastAPI framework, high performance, easy to learn, fast to code, ready for production
Home-page: 
Author: 
Author-email: =?utf-8?q?Sebasti=C3=A1n_Ram=C3=ADrez?= <tiangolo@gmail.com>
License: 
Location: /opt/linuxmuster/lib/python3.12/site-packages
Requires: pydantic, starlette, typing-extensions
Required-by: fastapi-sse

So it's not necessary to add it explicitly to the requirements, except if you have a concrete example of missing package in an automated installation of linuxmuster-api.

Cheers,

Arnaud