go:linkname giving error "invalid reference to syscall.munmap" in go 1.23.0

I am using this library in go 1.22 and after updating it into go 1.23 it giving error "invalid reference to syscall.munmap"  

```go
//go:linkname munmap syscall.munmap
func munmap(addr unsafe.Pointer, length uintptr) (err error)
``` 

@ii64 can you help me

