added a reference to demonstrate how to identify the branch
added a reference to demonstrate how to identify the branch

aakaakar/ranjan_chaincode7,sasikumarGoli/learn-chaincode,haribalaji79/learn-chaincode,aakaakar/learn-chaincode,anilder89/learn-chaincode,naveensharma99/learn-chaincode,apthomas/learn-chaincode,abhishekibm/learn-chaincode,hiroaki-nakamura/learn-chaincode,Earlvik/learn-chaincode,twitsakthi/learn-chaincode,Akasalabs/Plilot1,mshingote/learn-chaincode,Akasalabs/Plilot1,manchunw/learn-chaincode,MrRamers/learn-chaincode,everimbaq/learn-chaincode,adilharis2001/learn-chaincode,Earlvik/learn-chaincode,JonathanGonczoroski/learn-chaincode,cweiers/learn-chaincode,shivam3192/learn-chaincode,Earlvik/learn-chaincode,fabianromeroq/learn-chaincode,cbagade/healthcare_chain_code