Fix order of the element count and packet type bit field

weather-sensor/firmware/nrf24l01.h

 
 typedef struct __attribute__((packed)) BITFIELD_PACKET_COUNT_ELEMENT
 {
-	uint8_t elementCount : 3;
 	uint8_t packetType : 5;
+	uint8_t elementCount : 3;
 } BITFIELD_PACKET_COUNT_ELEMENT;
 
 typedef struct __attribute__((packed)) PACKET