Yes it's OK to boil bone broth as long as you do not boil the bone broth too long.
If you boil the bone broth for too long then it can overcook and overcooking the bone broth causes the bone broth to develop off flavors.
When you do boil the bone broth get the bone broth to a boiling and then turn the heat down to simmer so that you do not overcook the bone broth.
Simmering the bone broth is much better than boiling the bone broth too long.
The boiling of the bone broth will kill bacteria in the bone broth.
But even just the hot temperatures of simmering the bone broth will also kill off any bacteria.
I prefer to just simmer the bone broth instead of continuously boiling the bone broth.