Promote ioptron to BETA

rotators/ioptron/rot_ioptron.c

@@ -307,7 +307,7 @@ const struct rot_caps ioptron_rot_caps =
     .mfg_name =       "iOptron",
     .version =        "20220109.0",
     .copyright =      "LGPL",
-    .status =         RIG_STATUS_ALPHA,
+    .status =         RIG_STATUS_BETA,
     .rot_type =       ROT_TYPE_AZEL,
     .port_type =      RIG_PORT_SERIAL,
     .serial_rate_min  = 9600,