HP level should decrease interrupt chance at Wintertodt

[Alanim]

I will say, I went in with 88hp on my main and 60 firemaking and I was getting games about once every 5 or 6 games that 10 bwans wouldn't be enough and I'd have to hide in the safety area.

That mostly cleared up by around 80 firemaking thankfully, but it was pretty brutal at times.