bunpen: rename "methods" -> "restrict"

pkgs/additional/bunpen/main.ha

@@ -1,6 +1,6 @@
 // vim: set shiftwidth=2 :
 use log;
-use methods;
+use restrict;
 use rtext;
 use strings;
 use os;
@@ -19,6 +19,6 @@ export fn main() void = {
   let my_name = os::args[0];
   let exec_line = os::args[1..];
   rtext::no_new_privs();
-  methods::landlock_restrict();
+  restrict::landlock_restrict();
   do_exec(exec_line);
 };