NetBSD: Fix the value of PT_SUSPEND

Link: https://github.com/NetBSD/src/blob/6ace5fed3bd010695a1b88ca6c1f8a5af7793ffb/sys/sys/ptrace.h#L62

(backport <#4782>)
(cherry picked from commit 5e47663)

Author: tgross35

src/unix/bsd/netbsdlike/netbsd/mod.rs

@@ -1893,7 +1893,7 @@ pub const PT_GET_PROCESS_STATE: c_int = 18;
 pub const PT_SET_SIGINFO: c_int = 19;
 pub const PT_GET_SIGINFO: c_int = 20;
 pub const PT_RESUME: c_int = 21;
-pub const PT_SUSPEND: c_int = 23;
+pub const PT_SUSPEND: c_int = 22;
 pub const PT_STOP: c_int = 23;
 pub const PT_LWPSTATUS: c_int = 24;
 pub const PT_LWPNEXT: c_int = 25;