sabina-- -bash

I got a sabina-bash note, saying: The default interactive shell is now zsh. To update your account to use zsh, please run `chsh -s /bin/zsh`. For more details, please visit https://support.apple.com/kb/HT208050. Sabinas-MBP:~ sabina$

I have no idea what this means. I checked the apple support site, but couldn't find anaything about upating. Someone could help me?