'NVIC_PriorityGroup_2' in blinky-none-os example

[dwhacks]

Trying to build the "blinky-none-os" example in vscode/pio I get this error.

src/main.c:23:34: error: 'NVIC_PriorityGroup_2' undeclared (first use in this function); did you mean 'NVIC_PriorityGroup_1'?

New to this, so I don't really understand what it means, but if I change it to 1 and it suggests then it builds...