position_estimator_inav: be a bit more informative about this ominous offs

src/modules/position_estimator_inav/position_estimator_inav_main.c

@@ -389,8 +389,8 @@ int position_estimator_inav_thread_main(int argc, char *argv[])
 					} else {
 						wait_baro = false;
 						baro_offset /= (float) baro_init_cnt;
-						warnx("baro offs: %d", (int)baro_offset);
-						mavlink_log_info(mavlink_fd, "[inav] baro offs: %d", (int)baro_offset);
+						warnx("baro offset: %d m", (int)baro_offset);
+						mavlink_log_info(mavlink_fd, "[inav] baro offset: %d m", (int)baro_offset);
 						local_pos.z_valid = true;
 						local_pos.v_z_valid = true;
 					}