Do you really need it to stop? ie pick your battles.
If you do, then you need to give your dog something else to do before she puts her paws in - call her to you and play with her or give her a treat, or a kibble ball or a chew toy or an ice block.
Or you change the water bowl to one she won't splash in - too small to get her paws in.
Or get a much bigger water bowl for that spot. My outside one is a large ceramic bowl about a foot across and very heavy, ie it won't tip up even if my dog stands on it. However it is currently located next to a shell pool that catches water from one of my roof down pipes - so there is some paw cooling that goes on, I've got a couple of bath mats inside the back door so the paws are dry by the time she gets inside.