Mention the new coins config `chain_id` for UTXO coins

[mariocynicys]

After GLEECBTC/komodo-defi-framework#2499, we now have to have chain_id field for UTXO coins that we wish to support via WalletConnect.

That chain_id is a string that begins with "bip122:" for all UTXO coins and represents the bip122 chain of this coin. You can read more about that here: https://github.com/ChainAgnostic/CAIPs/blob/main/CAIPs/caip-4.md

These are the chain_ids for a couple of select coins supported by a couple of wallets now (bifrost and ledger):

btc = bip122:000000000019d6689c085ae165831e93
tbtc = bip122:000000000933ea01ad0ee984209779ba
ltc = bip122:12a765e31ffd4059bada1e25190f6e98
tltc = bip122:4966625a4b2851d9fdee139e56211a0d

e.g of coin with chain_id set in the config:

  {
    "coin": "BTC-segwit",
    "name": "bitcoin",
    "fname": "Bitcoin",
    "sign_message_prefix": "Bitcoin Signed Message:\n",
    "rpcport": 8332,
    "pubtype": 0,
    "p2shtype": 5,
    "wiftype": 128,
    "segwit": true,
    "bech32_hrp": "bc",
    "address_format": {
      "format": "segwit"
    },
    "orderbook_ticker": "BTC",
    "txfee": 0,
    "estimate_fee_mode": "ECONOMICAL",
    "mm2": 1,
    "required_confirmations": 1,
    "avg_blocktime": 600,
    "protocol": {
      "type": "UTXO",
      "protocol_data": {
        "chain_id": "bip122:000000000019d6689c085ae165831e93"
      }
    },
    "derivation_path": "m/84'/0'",
    "trezor_coin": "Bitcoin",
    "links": {
      "github": "https://github.com/bitcoin/bitcoin",
      "homepage": "https://bitcoin.org"
    }
  }