set PIN_GPS_EN in wismesh tag companion

Author: kallanreed

variants/rak_wismesh_tag/platformio.ini

@@ -94,6 +94,7 @@ build_flags =
   -D BLE_PIN_CODE=123456
   -D BLE_DEBUG_LOGGING=1
   -D OFFLINE_QUEUE_SIZE=256
+  -D PIN_GPS_EN=34
 ;  -D MESH_PACKET_LOGGING=1
   -D MESH_DEBUG=1
 build_src_filter = ${rak_wismesh_tag.build_src_filter}