Docs are outdated (visibleElements and initComplete)

[talia-storymaker]

https://asmyshlyaev177.github.io/react-horizontal-scrolling-menu/?path=/docs/docs--docs

visibleElements and initComplete have been removed, but are still in the docs.

[asmyshlyaev177]

Should be good now, just reused docs from README, I can't keep up with 2 versions of docs in different formats.