You do more than reference it -- you've copied a bunch of text and figures from it as well. Search for "The encoder’s inputs first flow through a self-attention layer" and read on from there. Most of the article is a word-for-word copy.
Slightly changing sentence structure is not paraphrasing or stating in your own words. Pointing a reader to an article for further reading is not the same as a citation.
To put it bluntly, your arrangement of the material, substantial paragraphs, and a significant number of your figures/graphics are copied from elsewhere without citation.
Of course, you are allowed to cite excerpts, but then the text should be clearly marked up as a citation.
Providing links billed as additional reading material doesn’t count as a citation.