Add the Maity badge to the README

tsk-xex87b4wams4 open chore

Add the Maity badge to the README.md of https://github.com/Zendure/Zendure-HA?:

[![maity](https://maity.team/badge/wolfgang/zendure-ha.svg)](https://maity.team/wolfgang/zendure-ha/overview)

The badge already serves; this card only puts the snippet into the README. If it is already there, there is nothing to change.

Acceptance: for a change, open a pull request in the repository against its default branch, never a direct push to the default branch, and report the card with the pull request. When nothing needs changing, report the card with code: false and say why: no empty pull request.