Hi, there are a couple of things that can go wrong here. Your github repository is updated fine, from your screenshot, but your static website is not being served through git-pages, which would have an address like `https://jystatistics.github.io
It's a bit of trial and error to do this. For one thing, by default, the repository is expected to be in the docs directory and, big deal, gh-pages expects a jekyll yaml. It can be made to work, but I switched to netlify, which uses Hugo-style yaml, and had it forward to my [address](https://technocrat.rbind.io]. (There are other options.)
I'm pretty sure you're ok on git. For deployment advice, see RMarkdown.
Finally, I'll throw down the generational gauntlet. I'm 72 and figured it out! You gonna let a boomer show you up? 
But do post follow up questions for more help.