Rename card title from "Maintaining TYPO3"

[Alagts]

We have to create a card on page https://docs.typo3.org/m/typo3/tutorial-getting-started/main/en-us/Installation/Index.html.

[Alagts]

It is not missing but it is misleading that it is called "TYPO3 Updates" in the card and "Maintaining TYPO3" in all other places (headline on Index.rst and in the menu).