It's not a real photo, it's as close as we can get to a "real" photo but it is actually a bunch of strings of information that where feed to an algorithm that calculated the black hole should look like that.
Aka a glorified artistic representation of a black hole.
You can't take a picture of a black hole because the thing absorbs
the light, making it simply impossible to see, it is literally invisible to the human eye.
>"holes" in space-time
That's just speculation, the black hole is just a mass of compressed matter with quite a heavy weight, the weight of the black hole makes it's gravitational pull strong enough to absorb light (which is a radio signal) and any other piece of matter that's around it.