zfs-allow.8: mention 'bookmark' permission

Reviewed-by: John Kennedy <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Lauri Tirkkonen <[email protected]>
Closes #12064

Author: lotheac

man/man8/zfs-allow.8

@@ -195,6 +195,7 @@ The following permissions are available:
 NAME             TYPE           NOTES
 allow            subcommand     Must also have the permission that is
                                 being allowed
+bookmark         subcommand
 clone            subcommand     Must also have the 'create' ability and
                                 'mount' ability in the origin file system
 create           subcommand     Must also have the 'mount' ability.