I wouldn't say there is no tracking at all. There might be no tracking by you and there certainly is no Javascript tracking applied, both of which is better than >90% websites out there, but you use two external resources, first bootstrapcdn for css and second giphy for the kitten gif. Those web sites get data for each request, including ip address, user agent and (possibly / if the browser supports it) cookie information.

giphy is a startup that is monetized via ads while bootstrapcdn's privacy policy explicitly states that it uses the ip address and user agent information for targeted advertisement [1]. As you are using a deeplink, you might avoid giphy's tracking which might only be js based, but one can never know. bootstrapcdn was built to be used as a CDN so they will definitely use the data that servers get for tracking.

So don't visit this website too often unless you want to see cat food ads :). Or IDK.

I don't think there is a big benefit from using a CDN for the CSS file, but self hosting the kitten picture means of course a big increase of traffic and idk how it looks like from a license point of view. I have no idea what a privacy friendly kitten picture hosting service would be.

[1]: https://www.bootstrapcdn.com/privacy-policy/