Update Radant rotator

https://github.com/Hamlib/Hamlib/pull/658

NEWS

@@ -8,6 +8,7 @@ Please send Hamlib bug reports to hamlib-developer@lists.sourceforge.net
 
 Version 4.2
     * 2021-04-06
+    * Added Radan rotator
     * Added Malachite SDR 
     * Major rework for PRM80
     * Add twiddle_timeout and twiddle_rit --set-conf options

rotators/radant/radant.c

@@ -180,8 +180,8 @@ radant_rot_stop(ROT *rot)
 const struct rot_caps radant_rot_caps =
 {
     ROT_MODEL(ROT_MODEL_RADANT),
-    .model_name =     "Radant",
-    .mfg_name =       "Hamlib",
+    .model_name =     "AZ-1/AZV-1",
+    .mfg_name =       "Radant",
     .version =        "20210409.0",
     .copyright =      "LGPL",
     .status =         RIG_STATUS_BETA,