Do you know how I can set allow http connections to my website (on Github pages with a custom domain), while ensuring that anyone who types "example.com" withou

Do you know how I can set allow http connections to my website (on Github pages with a custom domain), while ensuring that anyone who types "example.com" without a protocol gets the https version by default? I wanted to set up my website that way, but I couldn't figure out a way to do it, since many browsers still default to http.