Update documentation for render_block_core_loginout function

[david-binda]

Description

The docblock related to register_block_core_loginout function refers to core/latest-posts, while it should be using the core/loginout similarly to the render_block_core_loginout function in the same file.

This comit updates the reference the way it matches the block in question.

How has this been tested?

Documentation only change. Was not really tested.

Screenshots

Not applicable.

Types of changes

Code documentaiton update.

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• I've tested my changes with keyboard and screen readers.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).

[gziolo]

Thank you for the fix 👍🏻