Update readme file
Update readme file

abouillot/LoRaMac-node,seanelaval/LoRaMac-node,imec-idlab/LoRaMac-node,seanelaval/LoRaMac-node,abouillot/LoRaMac-node,reixd/LoRaMac-node,seanelaval/LoRaMac-node,reixd/LoRaMac-node,imec-idlab/LoRaMac-node