Reduce post write delay for FT991 to 25ms based on user testing

rigs/yaesu/ft991.c

@@ -56,7 +56,7 @@ const struct rig_caps ft991_caps =
     RIG_MODEL(RIG_MODEL_FT991),
     .model_name =         "FT-991",
     .mfg_name =           "Yaesu",
-    .version =            NEWCAT_VER ".1",
+    .version =            NEWCAT_VER ".2",
     .copyright =          "LGPL",
     .status =             RIG_STATUS_STABLE,
     .rig_type =           RIG_TYPE_TRANSCEIVER,