Altering the WordPress blog’s title

I would like to change my blog’s title, so that one word of it is crossed out. My blog is here: https://www.bloodytoe.com. Instead of its title reading “a runner’s blog”, I’d like it to read “a <crossed out>runner’s</crossed out> triathlete’s blog”, so that “runner’s” is crossed out. Is this a theme change or something else? Does anyone know how I can alter the title’s formatting for something like this?

Thanks, all,

Nathan