OpenBSD uses doas(1) not sudo(8)

For many years by now, sudo is available only as port and doas
took over as default tool in base.

Author: klemensn

install.rst

@@ -134,7 +134,7 @@ To install:
 
   .. code-block:: console
 
-     sudo pkg_add zeek
+     doas pkg_add zeek
 
 These packages are not maintained by the Zeek project.