update code

Author: bigwhite

chapter9/sources/go-unsafe/go_stack_obj_ref_by_uintptr.go

@@ -7,7 +7,7 @@ import (
 
 func main() {
 	var x = [10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 0}
-	fmt.Printf("变量x的值=%d\n", x)
+	fmt.Printf("变量x的值=%v\n", x)
 	println("变量x的地址=", &x)
 
 	var p = uintptr(unsafe.Pointer(&x))