C/C++ linter does not support "%b" specifier in printf-formatted strings

[Magyar57]

The linter (syntax coloring) for formatted strings displays an "error" (red character) for the %b specifier in C, even though this specifier is now supported since C23

Steps to reproduce:

1. touch printf_linter_bug.c && code printf_linter_bug.c
2. Paste:

int main(){
	printf("%b \n", 0x7f);
	return 0;
}

We observe that the '%' is coloured in red and the b in the string colour, whereas a correctly supported identifier (e.g. "%d") would show both in blue

This is valid C23 code, which you can check by compiling (with an up to date compiler): clang -std=c23 printf_linter_bug.c -o printf_linter_bug && ./printf_linter_bug (the command succeeds)