Putting static copies on Github Pages, Cloudflare Pages, and the Internet Archive would make pretty good odds it's preserved. The only real way to make sure would be to set up and fund some sort of trust to basically hire someone to run it after you're gone.
I think that this is probably the most realistic / sensible suggestion here if you want to preserve digital data for as long as possible.
(and assuming you don't have millions of dollars handy to put towards this goal - I could probably build you something pretty OK, but the cost might get into tens of millions or more depending on how many nines you want on that "chance of it existing in 100 years" figure)
I also agree with others who say "print out multiple redundant copies and put them in filing cabinets and/or bank vaults". This is probably the most reliable way to have a high probability of it lasting that long without spending a lot.
The core issue that you're going to have is that it's impossible to predict whether any institution you might trust to hold on to the data will still exist in 100 years. Having multiple copies on multiple redundant hosts gives you a higher chance, but it's still not possible to say what that chance is. And that's before we start thinking about things like climate change and the water wars everyone loves to predict.
