> Main Heading and Content-injection
> From Minima v2.2 onwards, the home layout will inject all content from your index.md / index.html before the Posts heading. This will allow you to include non-posts related content to be published on the landing page under a dedicated heading. We recommended that you title this section with a Heading2 (##).
Source: https://github.com/jekyll/minima#main-heading-and-content-injection
Felix Lohmeier