Added newest ELK token contract address and logo

[LtSnakePlissken]

Token Information

• Project official website: https://elk.finance

• Project official social: https://docs.elk.finance/social-channels

Verification of Token

• [x ] verify of your token smart contract on iotexscan.
• [ x] add your token address to your website and list here: https://docs.elk.finance/addresses/iotex