https://love2d.org/wiki/Game_Distribution
This might be helpful if you continue using that engine.
Also, while ".md" files do open easily enough under windows if pointed at a browser or notepad, I don't think it's a safe assumption that potential players will know that, even if they're participating in a game jam. If you release something for all platforms at once, it's a good idea to make a copy of your readme with the extension changed to ".txt" even if it's not changed at all.