Correct several documentation errors in defaults/main.yaml: - Rename @param rspamd_dkim_directory to rspamd_dkim_dir to match the actual variable name - Fix duplicate @param rspamd_worker_controller_read_password to correctly reference rspamd_worker_controller_write_password - Swap descriptions of rspamd_override_d_dir and rspamd_plugins_d_dir which were assigned to the wrong parameters Co-authored-by: GitHub Copilot