Fix doc comment on FreeBSD kinfo_proc

Cf. #2552 (comment)

Author: Minoru

src/unix/bsd/freebsdlike/freebsd/freebsd11/mod.rs

@@ -185,7 +185,7 @@ s! {
         pub ki_jid: ::c_int,
         /// Number of threads in total.
         pub ki_numthreads: ::c_int,
-        // Thread ID.
+        /// Thread ID.
         pub ki_tid: ::lwpid_t,
         /// Process priority.
         pub ki_pri: ::priority,

src/unix/bsd/freebsdlike/freebsd/freebsd12/mod.rs

@@ -194,7 +194,7 @@ s! {
         pub ki_jid: ::c_int,
         /// Number of threads in total.
         pub ki_numthreads: ::c_int,
-        // Thread ID.
+        /// Thread ID.
         pub ki_tid: ::lwpid_t,
         /// Process priority.
         pub ki_pri: ::priority,

src/unix/bsd/freebsdlike/freebsd/freebsd13/mod.rs

@@ -212,7 +212,7 @@ s! {
         pub ki_jid: ::c_int,
         /// Number of threads in total.
         pub ki_numthreads: ::c_int,
-        // Thread ID.
+        /// Thread ID.
         pub ki_tid: ::lwpid_t,
         /// Process priority.
         pub ki_pri: ::priority,

src/unix/bsd/freebsdlike/freebsd/freebsd14/mod.rs

@@ -212,7 +212,7 @@ s! {
         pub ki_jid: ::c_int,
         /// Number of threads in total.
         pub ki_numthreads: ::c_int,
-        // Thread ID.
+        /// Thread ID.
         pub ki_tid: ::lwpid_t,
         /// Process priority.
         pub ki_pri: ::priority,